/* CSS Custom Properties for Light/Dark Theme */
:root {
    /* Enhanced KPE Palette - Colors from aerial photo */
    --deep-lake-blue: #1a4d5c;
    --lake-blue: #2d7a8a;
    --forest-green: #1f3d2b;
    --sage-green: #4a6b5a;
    --sandy-beige: #c4b896;
    --stone-gray: #a8a191;
    --off-white: #fafafa;
    --warm-white: #ffffff;

    /* Light Theme Colors - Enhanced KPE Themed */
    --bg-primary: var(--off-white);
    --bg-secondary: var(--warm-white);
    --bg-tertiary: var(--warm-white);
    --text-primary: #1a2025;
    --text-secondary: #5a6b7a;
    --text-accent: var(--deep-lake-blue);
    --border-color: rgba(168, 161, 145, 0.3);
    --border-hover: var(--lake-blue);
    --btn-primary-bg: var(--deep-lake-blue);
    --btn-secondary-bg: rgba(196, 184, 150, 0.15);
    --btn-secondary-text: var(--forest-green);
    --btn-secondary-border: rgba(168, 161, 145, 0.4);
    --modal-bg: var(--warm-white);
    --upload-border: rgba(168, 161, 145, 0.4);
    --upload-border-hover: var(--lake-blue);
    --upload-bg-hover: rgba(45, 122, 138, 0.08);
    --spinner-color: var(--lake-blue);
    --error-color: #c94c4c;
    --success-color: var(--sage-green);
    --shadow: rgba(26, 77, 92, 0.08);
    --shadow-hover: rgba(26, 77, 92, 0.15);
    --shadow-glass: rgba(26, 77, 92, 0.12);
    --toast-error-bg: #c94c4c;
    --toast-success-bg: var(--sage-green);
    --toast-warning-bg: #d4a574;
    --toast-info-bg: var(--lake-blue);
}

/* Dark Theme Colors - Clean Blacks & Darks */
[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-accent: #e0e0e0;
    --border-color: #404040;
    --border-hover: #606060;
    --btn-primary-bg: #ffffff;
    --btn-secondary-bg: #404040;
    --btn-secondary-text: #ffffff;
    --btn-secondary-border: #606060;
    --modal-bg: #2a2a2a;
    --upload-border: #606060;
    --upload-border-hover: #808080;
    --upload-bg-hover: rgba(128, 128, 128, 0.1);
    --spinner-color: #b0b0b0;
    --error-color: #808080;
    --success-color: #a0a0a0;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-image: url('assets/aerial.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 100vh;
    margin: 0;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    font-weight: 400;
    line-height: 1.5;
}

#mainApp {
    height: 100vh;
}

/* Toast Notification Styles */
#toastContainer {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: stretch;
    min-width: 300px;
    max-width: 400px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow);
    transform: translateX(120%);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    overflow: hidden;
    opacity: 0;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast.fade-out {
    transform: translateX(120%);
    opacity: 0;
}

.toast-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 15px;
    font-size: 20px;
    font-weight: bold;
    color: white;
}

.toast-content {
    padding: 12px;
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.toast-message {
    font-size: 14px;
    color: var(--text-secondary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0 15px;
    cursor: pointer;
    font-size: 20px;
    transition: color 0.3s ease;
}

.toast-close:hover {
    color: var(--text-primary);
}

/* Toast Types */
.toast.success .toast-icon {
    background: var(--toast-success-bg);
}
.toast.error .toast-icon {
    background: var(--toast-error-bg);
}
.toast.warning .toast-icon {
    background: var(--toast-warning-bg);
}
.toast.info .toast-icon {
    background: var(--toast-info-bg);
}

/* Theme Toggle Button */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-primary);
    margin-right: 10px;
}

.theme-toggle:hover {
    background: var(--btn-secondary-bg);
    border-color: var(--border-hover);
    transform: scale(1.05);
}

.container {
    width: 100%;
    height: 100vh;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.header {
    background: var(--bg-secondary);
    padding: 20px;
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

#mainApp .header {
    background: linear-gradient(135deg, rgba(26, 77, 92, 0.85), rgba(31, 61, 43, 0.85));
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px var(--shadow-glass);
}

[data-theme="dark"] #mainApp .header {
    background: linear-gradient(135deg, rgba(26, 77, 92, 0.9), rgba(31, 61, 43, 0.9));
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

#mainApp .header .logo-main,
#mainApp .header .logo-sub {
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#mainApp .header .user-info {
    color: var(--warm-white);
}

#mainApp .header .user-info #userEmail {
    font-weight: 500;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

#mainApp .header .theme-toggle {
    color: var(--warm-white);
    border-color: rgba(255, 255, 255, 0.4);
}

#mainApp .header .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
}

#mainApp .header .btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--warm-white);
    backdrop-filter: blur(5px);
}

#mainApp .header .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.7);
    color: var(--warm-white);
}

.logo {
    font-family: 'Playfair Display', serif;
}

.logo-main {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.85rem;
    color: var(--text-secondary);
    letter-spacing: 0.8px;
    font-weight: 400;
    margin-top: 2px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: nowrap; /* Prevent wrapping of items inside user-info */
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn-pill {
    border-radius: 50px;
    padding: 14px 28px;
    font-weight: 600;
    box-shadow: 0 4px 16px var(--shadow);
}

.btn-icon {
    font-size: 16px;
    display: inline-flex;
    align-items: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--deep-lake-blue), var(--lake-blue));
    color: white;
    box-shadow: 0 4px 16px rgba(26, 77, 92, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--lake-blue), var(--deep-lake-blue));
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 77, 92, 0.4);
}

[data-theme="dark"] .btn-primary {
    color: white;
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: 1px solid var(--btn-secondary-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(196, 184, 150, 0.25);
    border-color: var(--lake-blue);
    color: var(--deep-lake-blue);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.btn:hover {
    transform: translateY(-3px);
}

.btn:active {
    transform: translateY(-1px);
    transition-duration: 0.1s;
}

/* Button ripple effect */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.login-container {
    max-width: 450px;
    margin: 100px auto;
    padding: 50px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px var(--shadow-glass);
}

.login-container h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 25px;
    color: var(--text-primary);
    line-height: 1.2;
}

.login-container .input-group {
    gap: 8px;
}

.login-container label {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-secondary);
}

.login-container input {
    background: rgba(255, 255, 255, 0.5);
    border-color: rgba(168, 161, 145, 0.6);
}

[data-theme="dark"] .login-container input {
    background: rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .login-container {
    background: rgba(30, 30, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.pending-approval-box {
    text-align: center;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: transparent;
}

.pending-approval-box h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

.pending-approval-box p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.login-form .btn {
    padding-top: 14px;
    padding-bottom: 14px;
    font-weight: 600;
}

.forgot-password-link {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    text-decoration: none;
    margin-top: 10px;
    transition: all 0.3s ease;
}

.forgot-password-link:hover {
    color: var(--lake-blue);
    text-decoration: underline;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

label {
    font-weight: 600;
    color: var(--text-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

input {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--border-hover);
    box-shadow: 0 0 0 3px var(--upload-bg-hover);
}

.main-content {
    background: var(--bg-primary);
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    transition: background-color 0.3s ease;
}

#mainApp .main-content {
    background: transparent;
}

/* Welcome Section */
.welcome-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    margin-bottom: 40px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px var(--shadow-glass);
}

[data-theme="dark"] .welcome-section {
    background: rgba(30, 30, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.welcome-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--deep-lake-blue);
    margin-bottom: 15px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

#mainApp .welcome-section .toolbar {
    background: transparent;
    backdrop-filter: none;
    padding: 0;
    border: none;
    box-shadow: none;
    margin-bottom: 0;
    width: 100%;
}

#mainApp .toolbar {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(15px);
    padding: 20px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 32px var(--shadow-glass);
    margin-bottom: 25px;
}

[data-theme="dark"] #mainApp .toolbar {
    background: rgba(30, 30, 30, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.search-container {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    max-width: 450px;
    margin: 0 20px;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 16px;
    font-size: 16px;
    color: var(--text-secondary);
    pointer-events: none;
    z-index: 2;
}

.search-input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 400;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px var(--shadow);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .search-input {
    background: rgba(30, 30, 30, 0.9);
}

.search-input:focus {
    outline: none;
    border-color: var(--lake-blue);
    box-shadow: 0 0 0 4px rgba(45, 122, 138, 0.15), 0 4px 16px var(--shadow-hover);
    transform: translateY(-1px);
}

.search-input:focus + .search-icon {
    color: var(--lake-blue);
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.breadcrumb {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
}

[data-theme="dark"] .breadcrumb {
    background: rgba(30, 30, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.breadcrumb-item {
    cursor: pointer;
    color: var(--deep-lake-blue);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
}

.breadcrumb-item:hover {
    color: var(--lake-blue);
    background: rgba(45, 122, 138, 0.1);
    transform: translateY(-1px);
}

.breadcrumb-item::after {
    content: '/';
    margin: 0 8px;
    color: var(--text-secondary);
    font-weight: 300;
}

.breadcrumb-item:last-child::after {
    display: none;
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.file-item, .folder-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 25px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 4px 16px var(--shadow);
}

#mainApp .file-item, #mainApp .folder-item {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px var(--shadow-glass);
}

[data-theme="dark"] #mainApp .file-item, [data-theme="dark"] #mainApp .folder-item {
    background: rgba(30, 30, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.drag-indicator {
    position: absolute;
    top: 8px;
    left: 8px;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 5;
}

.folder-item:hover .drag-indicator {
    opacity: 1;
}

.file-item:hover, .folder-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px var(--shadow-hover);
    border-color: var(--lake-blue);
}

#mainApp .file-item:hover, #mainApp .folder-item:hover {
    box-shadow: 0 16px 50px rgba(26, 77, 92, 0.25);
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] #mainApp .file-item:hover, [data-theme="dark"] #mainApp .folder-item:hover {
    background: rgba(30, 30, 30, 0.95);
}

/* Drag and Drop Styles */
.folder-item[draggable="true"] {
    cursor: grab;
}

.folder-item[draggable="true"]:hover {
    cursor: grab;
}

.folder-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
    cursor: grabbing;
}

.folder-item.drop-left {
    border-left: 3px solid var(--btn-primary-bg);
}

.folder-item.drop-right {
    border-right: 3px solid var(--btn-primary-bg);
}

.folder-item.drop-left::before {
    content: '';
    position: absolute;
    left: -3px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--btn-primary-bg);
    z-index: 10;
}

.folder-item.drop-right::after {
    content: '';
    position: absolute;
    right: -3px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--btn-primary-bg);
    z-index: 10;
}

.folder-icon {
    font-size: 56px;
    color: var(--deep-lake-blue);
    margin-bottom: 15px;
    filter: drop-shadow(0 2px 4px var(--shadow));
    transition: all 0.3s ease;
}

.file-icon {
    font-size: 56px;
    color: var(--sage-green);
    margin-bottom: 15px;
    filter: drop-shadow(0 2px 4px var(--shadow));
    transition: all 0.3s ease;
}

.folder-item:hover .folder-icon {
    transform: scale(1.1);
    color: var(--lake-blue);
}

.file-item:hover .file-icon {
    transform: scale(1.1);
    color: var(--forest-green);
}

[data-theme="dark"] .folder-icon {
    color: var(--lake-blue);
}

[data-theme="dark"] .file-icon {
    color: var(--sage-green);
}

.item-name {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-word;
    line-height: 1.3;
}

.item-meta {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.4;
}

.search-match-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    z-index: 10;
    box-shadow: 0 2px 6px var(--shadow);
}

.content-match {
    background: var(--success-color);
    border: 2px solid var(--warm-white);
}

.name-match {
    background: var(--lake-blue);
    border: 2px solid var(--warm-white);
}

.item-path {
    font-size: 11px;
    color: var(--text-secondary);
    background: rgba(45, 122, 138, 0.1);
    padding: 2px 8px;
    border-radius: 10px;
    margin: 5px 0;
    text-align: center;
    font-style: italic;
}

.item-name-container {
    position: relative;
    margin-bottom: 8px;
}

.upload-area {
    border: 2px dashed var(--upload-border);
    border-radius: 20px;
    padding: 50px 40px;
    text-align: center;
    margin-bottom: 40px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px var(--shadow-glass);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .upload-area {
    background: rgba(30, 30, 30, 0.75);
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(45, 122, 138, 0.1), transparent);
    transition: left 0.8s;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area:hover {
    border-color: var(--lake-blue);
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 12px 40px rgba(26, 77, 92, 0.2);
}

[data-theme="dark"] .upload-area:hover {
    background: rgba(30, 30, 30, 0.9);
}

.upload-area.drag-over {
    border-color: var(--deep-lake-blue);
    background: rgba(45, 122, 138, 0.15);
    transform: scale(1.02);
    border-style: solid;
    box-shadow: 0 16px 50px rgba(26, 77, 92, 0.3);
}

.upload-area input[type="file"] {
    display: none;
}

.upload-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--deep-lake-blue);
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.upload-area:hover .upload-text {
    color: var(--lake-blue);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px var(--shadow-glass);
    border-radius: 20px;
    padding: 40px;
    max-width: 450px;
    width: 90%;
    transition: all 0.3s ease;
}

.modal-content h3 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    font-size: 1.8rem;
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    justify-content: flex-end;
}

.form-actions .btn {
    flex: 1;
    min-width: 120px;
}

.form-actions .btn-secondary {
    flex: 0 0 auto;
    min-width: 100px;
    padding: 12px 20px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.close {
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    padding: 4px 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    user-select: none;
}

.close:hover {
    color: var(--text-primary);
    background: var(--btn-secondary-bg);
    transform: scale(1.1);
}

.error {
    color: var(--error-color);
    font-size: 14px;
    margin-top: 10px;
}

.success {
    color: var(--success-color);
    font-size: 14px;
    margin-top: 10px;
}

.loading {
    display: none;
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px var(--shadow-glass);
    margin: 20px auto;
    max-width: 300px;
}

[data-theme="dark"] .loading {
    background: rgba(30, 30, 30, 0.9);
}

.loading p {
    margin-top: 10px;
    color: var(--text-primary);
    font-weight: 500;
}

.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-primary); /* Changed from --background-primary to --bg-primary */
    z-index: 10000;
}

/* Enhanced Spinner animation */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--spinner-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
    box-shadow: 0 4px 12px var(--shadow);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Global smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Enhanced focus styles */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--lake-blue);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Improved transitions for all interactive elements */
a, button, input, select, textarea {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hidden {
    display: none !important;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px var(--shadow-glass);
    margin: 20px auto;
    max-width: 400px;
}

[data-theme="dark"] .empty-state {
    background: rgba(30, 30, 30, 0.9);
    color: var(--text-primary);
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 64px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    opacity: 0.7;
}

.item-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 5px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.file-item:hover .item-actions,
.folder-item:hover .item-actions {
    opacity: 1;
}

.delete-btn, .preview-btn {
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 25px;
    height: 25px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.preview-btn {
    background: var(--btn-primary-bg);
}

[data-theme="dark"] .preview-btn {
    color: #121212;
}

.delete-btn:hover {
    background: #ff4757;
    transform: scale(1.1);
}

.preview-btn:hover {
    background: var(--border-hover);
    transform: scale(1.1);
}

.edit-btn {
    background: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
    border: none;
    border-radius: 50%;
    width: 25px;
    height: 25px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.edit-btn:hover {
    background: var(--border-hover);
    transform: scale(1.1);
}

.color-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(35px, 1fr));
    gap: 8px;
    margin-top: 10px;
    max-height: 120px;
    overflow-y: auto;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
}

.color-swatch {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    position: relative;
}

/* Removed default swatch styles as it's no longer used */

.color-swatch.selected {
    border-color: var(--btn-primary-bg);
    box-shadow: 0 0 0 2px var(--modal-bg), 0 0 0 4px var(--btn-primary-bg);
}

.color-swatch:hover {
    transform: scale(1.1);
}

.color-swatch.selected::after {
    content: '✓';
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--btn-primary-bg);
    color: white;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--btn-primary-bg);
    width: 0%;
    transition: width 0.3s ease;
}

/* Admin Dashboard Styles */
.admin-nav {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--btn-primary-bg);
    color: white;
}

[data-theme="dark"] .tab-btn.active {
    color: #121212;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.admin-section {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.section-actions {
    display: flex;
    gap: 10px;
}

.users-grid {
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.users-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 15px;
    padding: 15px 20px;
    background: var(--btn-primary-bg);
    color: white;
    font-weight: 600;
    font-size: 14px;
}

[data-theme="dark"] .users-header {
    color: #121212;
}

.users-container {
    max-height: 500px;
    overflow-y: auto;
}

.user-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 15px;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
    align-items: center;
}

.user-row:hover {
    background: var(--upload-bg-hover);
}

.user-role {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.role-admin {
    background: #ff6b6b;
    color: white;
}

.role-uploader {
    background: #4ecdc4;
    color: white;
}

.role-viewer {
    background: var(--text-secondary);
    color: white;
}

.role-pending {
    background: #ffa726;
    color: white;
}

.user-actions {
    display: flex;
    gap: 5px;
}

.btn-small {
    padding: 5px 10px;
    font-size: 12px;
    border-radius: 4px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.stat-icon {
    font-size: 32px;
    opacity: 0.8;
}

.stat-info h3 {
    font-size: 24px;
    font-weight: bold;
    color: var(--text-primary);
    margin: 0;
}

.stat-info p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 14px;
}

.activity-section {
    margin-top: 30px;
}

.activity-list {
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-description {
    color: var(--text-primary);
}

.activity-time {
    color: var(--text-secondary);
    font-size: 12px;
}

.settings-group {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.settings-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.settings-group h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.setting-item {
    margin-bottom: 15px;
}

.setting-item:last-child {
    margin-bottom: 0;
}

.user-info-display {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.user-info-display p {
    margin: 5px 0;
    color: var(--text-primary);
}

select {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    width: 100%;
}

select:focus {
    outline: none;
    border-color: var(--border-hover);
    box-shadow: 0 0 0 3px var(--upload-bg-hover);
}

.admin-only {
    display: none;
}

.admin-only.show {
    display: inline-block;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 20px;
    }

    .user-info {
        flex-direction: column;
        gap: 15px;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .main-content {
        padding: 20px;
    }

    .upload-area {
        padding: 20px;
    }

    .upload-text {
        font-size: 16px;
    }

    .login-container {
        padding: 20px;
    }

    .login-form {
        padding: 30px;
        max-width: 100%;
    }

    /* Admin Dashboard Mobile Styles */
    .admin-nav {
        flex-wrap: wrap;
        gap: 5px;
    }

    .tab-btn {
        flex: 1;
        min-width: calc(33.333% - 5px);
        padding: 8px 10px;
        font-size: 12px;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
    }

    .users-header,
    .user-row {
        grid-template-columns: 1fr;
        gap: 10px;
        text-align: center;
    }

    .users-header {
        display: none;
    }

    .user-row {
        flex-direction: column;
        padding: 20px;
        border-radius: 8px;
        margin-bottom: 10px;
        background: var(--bg-secondary);
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .stat-card {
        padding: 15px;
    }

    .admin-section {
        padding: 20px;
    }

    /* User Multi-Select Mobile Styles */
    .selected-user-tag {
        max-width: 150px;
        font-size: 11px;
        padding: 3px 6px;
    }

    .user-tag-name {
        max-width: 80px;
        font-size: 11px;
    }

    .user-tag-email {
        max-width: 80px;
        font-size: 9px;
    }

    .remove-tag {
        width: 14px;
        height: 14px;
        font-size: 12px;
    }

    .select-dropdown {
        max-height: 150px;
    }

    .user-option {
        padding: 8px 10px;
    }
}

/* AI Chatbot Styles */
.chatbot-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.chatbot-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--btn-primary-bg);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    transition: all 0.3s ease;
}

[data-theme="dark"] .chatbot-toggle {
    color: #121212;
}

.chatbot-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--shadow-hover);
}

.chatbot-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    height: 520px;
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: 0 8px 32px var(--shadow-hover);
    border: 1px solid var(--border-color);
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.chatbot-window.show {
    display: flex;
}

.chatbot-header {
    background: var(--btn-primary-bg);
    color: white;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

[data-theme="dark"] .chatbot-header {
    color: #121212;
}

.chatbot-title {
    font-weight: 600;
    font-size: 16px;
}

.chatbot-close {
    background: rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.2);
    color: inherit;
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    font-weight: bold;
}

[data-theme="dark"] .chatbot-close {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.chatbot-close:hover {
    background: rgba(0, 0, 0, 0.2);
    transform: scale(1.1);
}

[data-theme="dark"] .chatbot-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.chatbot-messages {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--bg-secondary);
}

.message {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.4;
    word-wrap: break-word;
}

.message.user {
    background: var(--btn-primary-bg);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 6px;
}

[data-theme="dark"] .message.user {
    color: #121212;
}

.message.bot {
    background: var(--bg-primary);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 6px;
    border: 1px solid var(--border-color);
}

.message.typing {
    background: var(--bg-primary);
    color: var(--text-secondary);
    align-self: flex-start;
    border-bottom-left-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 16px;
}

.typing-dots {
    display: flex;
    align-items: center;
    gap: 4px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.chatbot-input-container {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    align-items: flex-end;
    background: var(--bg-primary);
}

.chatbot-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    resize: none;
    min-height: 20px;
    max-height: 80px;
    font-family: inherit;
}

.chatbot-input:focus {
    border-color: var(--btn-primary-bg);
    box-shadow: 0 0 0 2px rgba(33, 37, 41, 0.1);
}

[data-theme="dark"] .chatbot-input:focus {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.chatbot-send {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--btn-primary-bg);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

[data-theme="dark"] .chatbot-send {
    color: #121212;
}

.chatbot-send:hover:not(:disabled) {
    background: var(--border-hover);
    transform: scale(1.05);
}

.chatbot-send:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    transform: none;
    opacity: 0.6;
}

.chatbot-welcome {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    padding: 20px;
    line-height: 1.5;
}

.chatbot-suggestions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

.suggestion-button {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.suggestion-button:hover {
    background: var(--btn-primary-bg);
    color: white;
    border-color: var(--btn-primary-bg);
    transform: translateY(-1px);
}

[data-theme="dark"] .suggestion-button:hover {
    color: #121212;
}

@media (max-width: 768px) {
    .chatbot-container {
        bottom: 10px;
        right: 10px;
    }
    
    .chatbot-window {
        width: calc(100vw - 20px);
        height: calc(100vh - 100px);
        bottom: 70px;
        right: -10px;
    }
    
    .chatbot-toggle {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

/* User Multi-Select Component Styles */
.user-multi-select {
    position: relative;
    width: 100%;
}

.select-display {
    min-height: 44px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.select-display:hover {
    border-color: var(--border-hover);
}

.select-display.active {
    border-color: var(--lake-blue);
    box-shadow: 0 0 0 3px rgba(45, 122, 138, 0.15);
}

.select-display .placeholder {
    color: var(--text-secondary);
    font-size: 14px;
    font-style: italic;
}

.selected-user-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--btn-primary-bg);
    color: white;
    padding: 4px 8px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    max-width: 200px;
    transition: all 0.2s ease;
}

[data-theme="dark"] .selected-user-tag {
    color: #121212;
}

.selected-user-tag:hover {
    background: var(--lake-blue);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(45, 122, 138, 0.3);
}

.user-tag-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
    min-width: 0;
    flex: 1;
}

.user-tag-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

.user-tag-email {
    font-size: 10px;
    opacity: 0.9;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

.remove-tag {
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.remove-tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 4px 16px var(--shadow-hover);
    margin-top: 4px;
    display: none;
}

.select-dropdown.show {
    display: block;
}

.user-option {
    padding: 10px 12px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    border-bottom: 1px solid var(--border-color);
}

.user-option:last-child {
    border-bottom: none;
}

.user-option:hover {
    background: var(--upload-bg-hover);
}

.user-option.selected {
    background: var(--btn-primary-bg);
    color: white;
}

[data-theme="dark"] .user-option.selected {
    color: #121212;
}

.user-option .user-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-name {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.user-option.selected .user-name {
    color: inherit;
}

.user-email {
    font-size: 12px;
    color: var(--text-secondary);
    opacity: 0.8;
}

.user-option.selected .user-email {
    color: inherit;
    opacity: 0.9;
}

/* Document Sources Styles */
.document-sources {
    margin: 12px 0;
    padding: 12px;
    background: var(--surface-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 13px;
}

.sources-header {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 12px;
}

.source-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    margin: 4px 0;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: help;
    transition: all 0.2s ease;
}

.source-item:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}