:root {
    /* Color palette */
    --color-teal: hsla(197, 65%, 30%, 1);
    --color-seafoam: hsla(158, 25%, 60%, 1);
    --color-royal-blue: hsla(231, 70%, 16%, 1);
    
    /* Theme colors - light mode default */
    --color-primary: var(--color-teal);
    --color-primary-rgb: 23, 88, 115;
    --color-secondary: var(--color-seafoam);
    --color-accent: var(--color-royal-blue);
    --color-background: hsla(210, 50%, 98%, 1);
    --color-surface: hsla(0, 0%, 100%, 0.65);
    --color-surface-rgb: 255, 255, 255;
    --color-text: var(--color-royal-blue);
    --color-text-muted: hsla(190, 22%, 37%, 0.8);
    --color-border: hsla(158, 25%, 60%, 0.25);
    --color-shadow: hsla(231, 70%, 16%, 0.08);
    --color-highlight: hsla(158, 25%, 60%, 0.18);
    --color-glow: hsla(197, 65%, 30%, 0.35);
    
    /* Success and error colors */
    --color-success: hsla(135, 53%, 43%, 1);
    --color-error: hsla(5, 81%, 56%, 1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-round: 50%;
    
    /* Glass effect */
    --glass-blur: 16px;
    --glass-opacity: 0.65;
    --glass-border: 1px solid rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px hsla(231, 70%, 16%, 0.1);
    
    /* Login page variables */
    --primary-color: var(--color-primary);
    --primary-dark: hsla(197, 65%, 25%, 1);
    --primary-rgb: var(--color-primary-rgb);
    --text-color: var(--color-text);
    --text-secondary: var(--color-text-muted);
    --bg-primary: var(--color-background);
    --bg-secondary: hsla(210, 50%, 95%, 1);
    --card-bg: white;
    --input-bg: hsla(210, 50%, 98%, 1);
    --border-color: hsla(158, 25%, 60%, 0.3);
    --border-dark: hsla(197, 65%, 20%, 0.3);
    --error-color: var(--color-error);
    --error-light: hsla(5, 81%, 95%, 1);
}

[data-theme="dark"] {
    --color-primary: var(--color-seafoam);
    --color-primary-rgb: 135, 172, 163;
    --color-secondary: var(--color-teal);
    --color-accent: var(--color-seafoam);
    --color-background: hsla(231, 70%, 13%, 1);
    --color-surface: hsla(197, 65%, 30%, 0.12);
    --color-surface-rgb: 23, 88, 115;
    --color-text: hsla(0, 0%, 100%, 0.95);
    --color-text-muted: hsla(158, 25%, 60%, 0.7);
    --color-border: hsla(158, 25%, 60%, 0.2);
    --color-shadow: hsla(0, 0%, 0%, 0.3);
    --color-highlight: hsla(158, 25%, 60%, 0.2);
    --color-glow: hsla(158, 25%, 60%, 0.4);
    
    /* Glass effect for dark mode */
    --glass-blur: 16px;
    --glass-opacity: 0.1;
    --glass-border: 1px solid rgba(135, 172, 163, 0.1);
    --glass-shadow: 0 8px 32px hsla(0, 0%, 0%, 0.25);
    
    /* Login page variables - dark mode */
    --primary-color: var(--color-seafoam);
    --primary-dark: hsla(158, 35%, 50%, 1);
    --text-color: var(--color-text);
    --text-secondary: var(--color-text-muted);
    --bg-primary: var(--color-background);
    --bg-secondary: hsla(231, 70%, 15%, 1);
    --card-bg: hsla(231, 70%, 18%, 1);
    --input-bg: hsla(231, 70%, 20%, 1);
    --border-color: hsla(158, 25%, 60%, 0.2);
    --border-dark: hsla(158, 25%, 60%, 0.3);
    --error-color: hsla(5, 81%, 60%, 1);
    --error-light: hsla(5, 60%, 20%, 1);
}

/* Typography */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Georgia&display=swap');

/* Base styles */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: Georgia, serif;
    background-color: var(--color-background);
    background-image: 
        radial-gradient(circle at 20% 30%, hsla(var(--color-teal-h, 197), 65%, 30%, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, hsla(var(--color-seafoam-h, 158), 25%, 60%, 0.05) 0%, transparent 50%);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-theme="dark"] body {
    background-image: 
        radial-gradient(circle at 20% 30%, hsla(var(--color-teal-h, 197), 65%, 30%, 0.1) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, hsla(var(--color-seafoam-h, 158), 25%, 60%, 0.08) 0%, transparent 60%);
}

h1, h2, h3, h4, h5, h6, .app-title, .pane-header h2 {
    font-family: 'DM Serif Display', Georgia, serif;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    gap: var(--space-xl);
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-xl);
    border-bottom: var(--glass-border);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.logo {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 0 10px var(--color-glow));
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px var(--color-glow)) brightness(1.1);
}

.app-title {
    color: var(--color-primary);
    font-size: 2.2rem;
    margin: 0;
    transition: color 0.3s ease;
    text-shadow: 0 2px 8px var(--color-glow);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

/* Theme toggle */
.theme-toggle {
    background: var(--color-surface);
    border: var(--glass-border);
    cursor: pointer;
    padding: 8px 16px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-primary);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--color-shadow), 0 0 20px var(--color-glow);
}

.theme-toggle svg {
    width: 22px;
    height: 22px;
    transition: transform 0.5s ease;
}

.theme-toggle:hover svg {
    transform: rotate(30deg);
}

.theme-label {
    font-family: 'DM Serif Display', Georgia, serif;
    font-size: 14px;
    letter-spacing: 0.02em;
}

/* Split layout */
.split-layout {
    display: flex;
    gap: var(--space-xl);
    flex: 1;
    height: calc(100vh - 180px);
    min-height: 500px;
}

/* Panes */
.pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--color-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
}

.pane:hover {
    box-shadow: 0 12px 42px var(--color-shadow), 0 0 15px var(--color-glow);
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) -100%);
    color: white;
    border-bottom: var(--glass-border);
}

.pane-header h2 {
    margin: 0;
    font-size: 1.4rem;
    letter-spacing: 0.03em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.pane-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
}

.pane-header-controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.file-upload-container {
    display: flex;
    align-items: center;
}

.file-upload-btn {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    padding: var(--space-sm) var(--space-lg);
    font-size: 14px;
    font-family: 'DM Serif Display', Georgia, serif;
    letter-spacing: 0.03em;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.file-upload-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3), 0 0 15px var(--color-glow);
}

.file-upload-btn svg {
    transition: transform 0.3s ease;
}

.file-upload-btn:hover svg {
    transform: translateY(-2px);
}

/* Left pane - Text area */
.text-pane {
    flex: 3;
}

.text-editor {
    flex: 1;
    padding: var(--space-xl);
    overflow-y: auto;
    white-space: pre-wrap;
    outline: none;
    font-size: 16px;
    line-height: 1.7;
    background-color: var(--color-surface);
    color: var(--color-text);
    transition: all 0.3s ease;
    position: relative;
}

.text-editor.view-only {
    cursor: default;
    background-color: rgba(var(--color-surface-rgb), var(--glass-opacity));
    border-left: 3px solid var(--color-primary);
    position: relative;
}

.text-editor.view-only::before {
    content: "Read Only";
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 12px;
    font-family: 'DM Serif Display', Georgia, serif;
    color: var(--color-text-muted);
    background-color: var(--color-surface);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    opacity: 0.8;
    pointer-events: none;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.text-editor:focus {
    box-shadow: inset 0 0 0 2px var(--color-primary), inset 0 0 16px rgba(23, 88, 115, 0.1);
}

.highlight {
    background-color: var(--color-primary);
    color: white;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    box-shadow: 0 2px 8px var(--color-glow);
    position: relative;
    z-index: 2;
    display: inline-block;
    animation: highlight-pulse 2s infinite;
}

@keyframes highlight-pulse {
    0% { box-shadow: 0 2px 8px var(--color-glow); }
    50% { box-shadow: 0 2px 12px var(--color-glow), 0 0 20px var(--color-glow); }
    100% { box-shadow: 0 2px 8px var(--color-glow); }
}

.sentence {
    display: inline;
    transition: background-color 0.3s ease;
    position: relative;
    z-index: 1;
}

.sentence.highlighted {
    background-color: var(--color-highlight);
    border-radius: var(--radius-sm);
    padding: 3px 2px;
    animation: pulse 2s infinite;
    box-shadow: 0 0 8px var(--color-glow);
    position: relative;
    z-index: 1;
    outline: 2px dashed var(--color-primary);
    outline-offset: 2px;
}

/* Add a subtle marker to the beginning of highlighted sentences for extra visibility */
.sentence.highlighted::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-primary);
    margin-right: 4px;
    box-shadow: 0 0 8px var(--color-glow);
}

@keyframes pulse {
    0% { background-color: var(--color-highlight); box-shadow: 0 0 4px var(--color-glow); }
    50% { background-color: rgba(var(--color-primary-rgb, 23, 88, 115), 0.2); box-shadow: 0 0 12px var(--color-glow); }
    100% { background-color: var(--color-highlight); box-shadow: 0 0 4px var(--color-glow); }
}

/* Right pane - Names list */
.names-pane {
    flex: 1;
}

.names-count {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    background-color: rgba(0, 0, 0, 0.2);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 500;
    letter-spacing: 0.03em;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.names-list {
    padding: var(--space-lg);
    overflow-y: auto;
    height: 100%;
}

.empty-state, .error-state {
    text-align: center;
    padding: var(--space-xxl) var(--space-lg);
    color: var(--color-text-muted);
    font-style: italic;
}

.error-state {
    color: var(--color-error);
}

.name-item {
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--color-shadow);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.name-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--color-shadow), 0 0 15px var(--color-glow);
}

.name-item.selected {
    background-color: var(--color-highlight);
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 8px 20px var(--color-shadow), 0 0 15px var(--color-glow);
}

.name-item:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 4px;
    background-color: var(--color-primary);
    z-index: 1;
    transition: all 0.3s ease;
}

.name-item.accepted:before {
    background-color: var(--color-success);
    box-shadow: 0 0 10px rgba(52, 168, 83, 0.5);
}

.name-item.rejected:before {
    background-color: #ccc;
}

.name-text {
    font-family: 'DM Serif Display', Georgia, serif;
    font-weight: normal;
    font-size: 1.1rem;
    color: var(--color-text);
    transition: color 0.3s ease;
    letter-spacing: 0.02em;
}

.name-text small {
    opacity: 0.7;
    font-family: Georgia, serif;
    font-weight: normal;
    font-size: 0.85rem;
}

.name-actions {
    display: flex;
    gap: var(--space-sm);
}

.name-action {
    border: none;
    padding: 8px;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-round);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.name-action.animated {
    animation: pulse-button 0.5s ease;
}

@keyframes pulse-button {
    0% { transform: scale(1); box-shadow: 0 0 0 rgba(0, 0, 0, 0); }
    50% { transform: scale(1.2); box-shadow: 0 0 20px var(--color-glow); }
    100% { transform: scale(1); box-shadow: 0 0 10px var(--color-glow); }
}

.accept-btn {
    background-color: var(--color-success);
    color: white;
    box-shadow: 0 2px 8px rgba(52, 168, 83, 0.3);
}

.accept-btn:hover {
    background-color: #2d9348;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(52, 168, 83, 0.5), 0 0 15px rgba(52, 168, 83, 0.4);
}

.reject-btn {
    background-color: var(--color-error);
    color: white;
    box-shadow: 0 2px 8px rgba(234, 67, 53, 0.3);
}

.reject-btn:hover {
    background-color: #d33426;
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(234, 67, 53, 0.5), 0 0 15px rgba(234, 67, 53, 0.4);
}

.name-item.accepted {
    border-left-color: var(--color-success);
}

.name-item.accepted .name-text {
    color: var(--color-success);
}

.name-item.rejected {
    opacity: 0.5;
    text-decoration: line-through;
    border-left-color: #ccc;
}

/* Button */
button {
    background-color: var(--color-primary);
    color: white;
    border: none;
    padding: var(--space-sm) var(--space-lg);
    font-size: 15px;
    font-family: 'DM Serif Display', Georgia, serif;
    letter-spacing: 0.03em;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--color-shadow);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

button:hover {
    background-color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--color-shadow), 0 0 15px var(--color-glow);
}

button svg {
    transition: transform 0.3s ease;
}

button:hover svg {
    transform: scale(1.2) rotate(5deg);
}

button:after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.3) 50%, rgba(255, 255, 255, 0) 100%);
    transform: rotate(30deg);
    transition: all 0.6s ease;
    opacity: 0;
}

button:hover:after {
    transform: rotate(30deg) translate(100%, 0);
    opacity: 1;
}

/* Button processing state */
button.processing {
    pointer-events: none;
    position: relative;
}

button.processing:after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-top-color: white;
    border-radius: 50%;
    right: var(--space-md);
    animation: spin 0.8s linear infinite;
}

/* Loading */
.loading {
    text-align: center;
    margin: var(--space-xl) 0;
    font-style: italic;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

.loading::after {
    content: "";
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    margin-left: var(--space-md);
    animation: spin 0.8s linear infinite;
    box-shadow: 0 0 10px var(--color-glow);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Progress Bar */
.progress-container {
    margin: var(--space-md) var(--space-lg);
    padding: var(--space-sm);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px var(--color-shadow);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: var(--glass-border);
}

.progress-bar {
    width: 100%;
    height: 10px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
    box-shadow: 0 0 10px var(--color-glow);
}

.progress-text {
    font-size: 13px;
    margin-top: var(--space-sm);
    text-align: center;
    color: var(--color-text-muted);
    font-family: Georgia, serif;
    letter-spacing: 0.02em;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    background-clip: padding-box;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
    background-clip: padding-box;
}

/* File upload notification */
.upload-notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--color-primary);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px var(--color-shadow), 0 0 15px var(--color-glow);
    z-index: 1000;
    font-family: 'DM Serif Display', Georgia, serif;
    transform: translateY(100px);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
}

.upload-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Animation to show something is clickable */
@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
    100% { transform: translateY(0); }
}

.name-item {
    animation: float 5s ease-in-out infinite;
    animation-play-state: paused;
}

.name-item:hover {
    animation-play-state: running;
}

/* Responsive */
@media (max-width: 768px) {
    .split-layout {
        flex-direction: column;
        height: auto;
        gap: var(--space-lg);
    }
    
    .text-pane, .names-pane {
        flex: none;
        height: 450px;
    }
    
    .brand {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .app-title {
        font-size: 1.8rem;
    }
    
    .main-container {
        padding: var(--space-md);
    }
    
    .header-controls {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-end;
    }
}