/* StudyLogix - Nothing OS Design System */
@import url('https://fonts.googleapis.com/css2?family=DotGothic16&family=JetBrains+Mono:wght@300;400;500;600;700&display=swap');

:root {
    /* Nothing OS Color Palette */
    --nothing-black: #000000;
    --nothing-white: #ffffff;
    --nothing-gray-900: #0a0a0a;
    --nothing-gray-800: #1a1a1a;
    --nothing-gray-700: #2a2a2a;
    --nothing-gray-600: #404040;
    --nothing-gray-500: #666666;
    --nothing-gray-400: #999999;
    --nothing-gray-300: #cccccc;
    --nothing-gray-200: #e6e6e6;
    --nothing-gray-100: #f5f5f5;
    
    /* Nothing OS Accent Colors */
    --nothing-red: #ff3333;
    --nothing-orange: #ff8c00;
    --nothing-yellow: #ffff00;
    --nothing-green: #00ff66;
    --nothing-blue: #0066ff;
    --nothing-purple: #9933ff;
    --nothing-cyan: #00ffcc;
    
    /* Glassmorphism Variables */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glass-backdrop: blur(20px);
    
    /* Nothing OS Shadows */
    --shadow-glow: 0 0 20px rgba(0, 255, 204, 0.2);
    --shadow-glow-intense: 0 0 40px rgba(0, 255, 204, 0.4);
    --shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-ambient: 0 4px 16px rgba(0, 0, 0, 0.4);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Theme Variables (Dark Mode) */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #999999;
    --border-color: rgba(255, 255, 255, 0.1);
}

/* Light Theme - Vibrant & Colorful */
html.light-theme {
    --bg-primary: #f5f7ff;
    --bg-secondary: #eef2ff;
    --bg-tertiary: #e0e8ff;
    --text-primary: #0a0e27;
    --text-secondary: #1a2050;
    --text-tertiary: #404080;
    --border-color: rgba(0, 51, 255, 0.2);
    --glass-bg: rgba(99, 155, 255, 0.08);
    --glass-border: rgba(0, 102, 255, 0.25);
    --glass-shadow: 0 8px 32px rgba(0, 102, 255, 0.12);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.2);
    --shadow-glow-intense: 0 0 40px rgba(0, 102, 255, 0.3);
}

/* Global Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent; /* Remove tap highlight on mobile */
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%; /* Prevent font scaling in landscape */
}

body {
    font-family: 'JetBrains Mono', 'DotGothic16', monospace;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 255, 204, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 51, 51, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 102, 255, 0.05) 0%, transparent 50%),
        linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    font-weight: 400;
    position: relative;
    transition: background var(--transition-slow), color var(--transition-slow);
    -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
}

html.light-theme body {
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 150, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 100, 100, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(100, 200, 255, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.02)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'DotGothic16', monospace;
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: var(--text-primary);
}

html.light-theme h1, html.light-theme h2, html.light-theme h3, html.light-theme h4, html.light-theme h5, html.light-theme h6 {
    color: #0a0e27;
}

.text-gradient {
    background: linear-gradient(135deg, var(--nothing-cyan), var(--nothing-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

html.light-theme .text-gradient {
    background: linear-gradient(135deg, #0066ff, #0099ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Glassmorphism Card Base */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), var(--shadow-glow);
    border-color: rgba(0, 255, 204, 0.2);
}

html.light-theme .glass-card:hover {
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 12px 40px rgba(0, 102, 255, 0.15), 0 0 20px rgba(0, 102, 255, 0.1);
}

html.light-theme .glass-card {
    border-left: 4px solid #0066ff;
}

html.light-theme .glass-card:nth-child(2) {
    border-left-color: #00cc66;
}

html.light-theme .glass-card:nth-child(3) {
    border-left-color: #ff8c00;
}

html.light-theme .glass-card:nth-child(4) {
    border-left-color: #ff3333;
}

html.light-theme .glass-card:nth-child(5) {
    border-left-color: #9933ff;
}

/* Ambient Animations */
@keyframes ambient-pulse {
    0%, 100% { 
        box-shadow: var(--glass-shadow), 0 0 20px rgba(0, 255, 204, 0.1);
        transform: scale(1);
    }
    50% { 
        box-shadow: var(--glass-shadow), 0 0 30px rgba(0, 255, 204, 0.2);
        transform: scale(1.005);
    }
}

@keyframes glow-rotate {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
}

.ambient-card {
    animation: ambient-pulse 4s ease-in-out infinite;
}

.glow-rotate {
    animation: glow-rotate 8s linear infinite;
}

.float {
    animation: float 6s ease-in-out infinite;
}

/* Nothing OS Button System */
.btn-nothing {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--nothing-white);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 204, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn-nothing:hover::before {
    left: 100%;
}

.btn-nothing:hover {
    border-color: var(--nothing-cyan);
    color: var(--nothing-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.3);
    transform: translateY(-2px);
}

.btn-nothing-primary {
    background: linear-gradient(135deg, rgba(0, 255, 204, 0.1), rgba(0, 102, 255, 0.1));
    border-color: var(--nothing-cyan);
    color: var(--nothing-cyan);
}

.btn-nothing-primary:hover {
    background: linear-gradient(135deg, rgba(0, 255, 204, 0.2), rgba(0, 102, 255, 0.2));
    box-shadow: var(--shadow-glow-intense);
}

html.light-theme .btn-nothing-primary {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.08), rgba(0, 150, 200, 0.08));
    border-color: #0066ff;
    color: #0066ff;
}

html.light-theme .btn-nothing-primary:hover {
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.15), rgba(0, 150, 200, 0.15));
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.25);
    border-color: #0052cc;
}

.btn-nothing-danger {
    border-color: var(--nothing-red);
    color: var(--nothing-red);
}

.btn-nothing-danger:hover {
    background: rgba(255, 51, 51, 0.1);
    box-shadow: 0 0 20px rgba(255, 51, 51, 0.3);
}

/* Icon Button */
.btn-icon {
    width: 48px;
    height: 48px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.btn-icon i {
    font-size: 18px;
}

/* Nothing OS Navbar */
.navbar-nothing {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    padding: 12px 24px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
    max-width: 90vw;
    width: fit-content;
}

.navbar-nothing:hover {
    box-shadow: var(--glass-shadow), var(--shadow-glow);
}

.navbar-brand-nothing {
    font-family: 'DotGothic16', monospace;
    font-size: 18px;
    color: var(--nothing-white);
    text-decoration: none;
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-base);
}

.navbar-brand-nothing:hover {
    color: var(--nothing-cyan);
    transform: scale(1.05);
}

.navbar-brand-nothing .brand-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--nothing-cyan), var(--nothing-blue));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    animation: glow-rotate 8s linear infinite;
}

.navbar-nav-nothing {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
    margin: 0;
}

.nav-link-nothing {
    color: var(--nothing-gray-300);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link-nothing:hover,
.nav-link-nothing.active {
    color: var(--nothing-cyan);
    background: rgba(0, 255, 204, 0.1);
    transform: scale(1.05);
}

.nav-link-nothing i {
    font-size: 16px;
}

/* Mobile Navbar Toggle */
.navbar-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--nothing-white);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

@media (max-width: 768px) {
    .navbar-nothing {
        position: fixed;
        top: 10px;
        left: 10px;
        right: 10px;
        transform: none;
        padding: 16px;
        border-radius: var(--radius-lg);
        max-width: none;
        max-height: 90vh;
        overflow-y: auto;
        z-index: 10000;
    }
    
    .navbar-toggle {
        display: block;
        z-index: 10001;
    }
    
    .navbar-nav-nothing {
        display: none;
        flex-direction: column;
        gap: 8px;
        margin-top: 16px;
        width: 100%;
    }
    
    .navbar-nav-nothing.active {
        display: flex;
    }
    
    .nav-link-nothing {
        width: 100%;
        justify-content: flex-start;
        padding: 12px 16px !important;
        border-radius: var(--radius-sm);
    }
    
    .navbar-brand-nothing {
        font-size: 16px !important;
    }
    
    .navbar-brand-nothing span {
        display: inline !important;
    }
}

/* Container Spacing */
.container-nothing {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    margin-top: 120px; /* Account for fixed navbar */
}

@media (max-width: 768px) {
    .container-nothing {
        margin-top: 85px;
        padding: 0 16px;
    }
}

/* Stats Cards with Nothing OS Design */
.stats-card-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.stats-card-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--nothing-cyan), transparent);
    animation: ambient-pulse 3s ease-in-out infinite;
}

.stats-card-nothing:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--glass-shadow), var(--shadow-glow);
    border-color: rgba(0, 255, 204, 0.3);
}

.stats-value-nothing {
    font-family: 'DotGothic16', monospace;
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--nothing-cyan);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: glow-rotate 10s linear infinite;
}

.stats-label-nothing {
    font-size: 14px;
    color: var(--nothing-gray-300);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.stats-icon-nothing {
    font-size: 24px;
    opacity: 0.8;
    color: var(--nothing-cyan);
}

/* Card Variants */
.stats-card-primary {
    border-left: 3px solid var(--nothing-cyan);
}

.stats-card-primary .stats-value-nothing {
    color: var(--nothing-cyan);
}

.stats-card-success {
    border-left: 3px solid var(--nothing-green);
}

.stats-card-success .stats-value-nothing,
.stats-card-success .stats-icon-nothing {
    color: var(--nothing-green);
}

.stats-card-warning {
    border-left: 3px solid var(--nothing-orange);
}

.stats-card-warning .stats-value-nothing,
.stats-card-warning .stats-icon-nothing {
    color: var(--nothing-orange);
}

.stats-card-danger {
    border-left: 3px solid var(--nothing-red);
}

.stats-card-danger .stats-value-nothing,
.stats-card-danger .stats-icon-nothing {
    color: var(--nothing-red);
}

/* Responsive Grid System */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.content-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.command-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.pomodoro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.stats-grid-mini {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .content-grid-2 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .command-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .pomodoro-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .stats-grid-mini {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .command-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .pomodoro-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .stats-grid-mini {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
}

/* Pomodoro Timer - Floating Orb Design */
.pomodoro-orb {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2000;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle at 30% 30%, rgba(0, 255, 204, 0.3), rgba(0, 0, 0, 0.8));
    border: 2px solid var(--nothing-cyan);
    border-radius: 50%;
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    box-shadow: 
        0 0 60px rgba(0, 255, 204, 0.4),
        inset 0 0 60px rgba(0, 255, 204, 0.1);
    display: none;
    animation: orb-float 6s ease-in-out infinite, orb-glow 3s ease-in-out infinite;
}

.pomodoro-orb.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

@keyframes orb-float {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.05); }
}

@keyframes orb-glow {
    0%, 100% { 
        box-shadow: 
            0 0 60px rgba(0, 255, 204, 0.4),
            inset 0 0 60px rgba(0, 255, 204, 0.1);
    }
    50% { 
        box-shadow: 
            0 0 100px rgba(0, 255, 204, 0.6),
            inset 0 0 100px rgba(0, 255, 204, 0.2);
    }
}

.pomodoro-time-display {
    font-family: 'DotGothic16', monospace;
    font-size: 3rem;
    color: var(--nothing-cyan);
    text-align: center;
    margin-bottom: 16px;
    text-shadow: 0 0 20px rgba(0, 255, 204, 0.6);
    animation: time-pulse 2s ease-in-out infinite;
}

@keyframes time-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.pomodoro-label {
    font-size: 14px;
    color: var(--nothing-gray-300);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-align: center;
    margin-bottom: 24px;
}

.pomodoro-progress {
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    background: conic-gradient(
        var(--nothing-cyan) 0deg,
        var(--nothing-cyan) var(--progress-angle, 0deg),
        transparent var(--progress-angle, 0deg),
        transparent 360deg
    );
    mask: radial-gradient(circle, transparent 140px, black 142px);
    -webkit-mask: radial-gradient(circle, transparent 140px, black 142px);
    animation: progress-rotate 1s linear infinite;
}

@keyframes progress-rotate {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(10deg); }
}

.pomodoro-controls {
    display: flex;
    gap: 16px;
    margin-top: 24px;
}

.pomodoro-card-small {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.pomodoro-card-small::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--nothing-red), transparent);
}

.pomodoro-card-small:hover {
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), 0 0 30px rgba(255, 51, 51, 0.3);
    border-color: rgba(255, 51, 51, 0.3);
}

/* Focus Mode Overlay */
.focus-mode-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at center, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.95) 100%);
    backdrop-filter: blur(50px);
    -webkit-backdrop-filter: blur(50px);
    z-index: 1999;
    display: none;
    animation: focus-fade-in 0.5s ease-out;
}

.focus-mode-overlay.active {
    display: block;
}

@keyframes focus-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Charts with Nothing OS Styling */
.chart-container-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.chart-container-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--nothing-blue), transparent);
}

.chart-container-nothing:hover {
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), 0 0 30px rgba(0, 102, 255, 0.2);
    border-color: rgba(0, 102, 255, 0.3);
}

.chart-title-nothing {
    font-family: 'DotGothic16', monospace;
    font-size: 18px;
    color: var(--nothing-white);
    margin-bottom: 20px;
    text-align: center;
    letter-spacing: 0.05em;
}

/* Form Elements */
.form-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
}

.form-nothing:hover {
    box-shadow: var(--glass-shadow), var(--shadow-glow);
}

.form-group-nothing {
    margin-bottom: 24px;
}

.form-label-nothing {
    display: block;
    font-size: 14px;
    color: var(--nothing-gray-300);
    margin-bottom: 8px;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.form-control-nothing {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--nothing-white);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    -webkit-appearance: none;
    appearance: none;
}

.form-control-nothing:focus {
    outline: none;
    border-color: var(--nothing-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

html.light-theme .form-control-nothing {
    background: rgba(0, 102, 255, 0.04);
    border-color: rgba(0, 102, 255, 0.2);
    color: var(--text-primary);
}

html.light-theme .form-control-nothing:focus {
    outline: none;
    border-color: #0066ff;
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.2);
    background: rgba(0, 102, 255, 0.08);
}

html.light-theme .form-control-nothing::placeholder {
    color: var(--text-tertiary);
}

/* Select Dropdown */
.form-select-nothing {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2300ffcc' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px 12px;
    padding-right: 40px;
}

/* Alert System */
.alert-nothing {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
    border: 1px solid transparent;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.alert-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: currentColor;
}

.alert-success-nothing {
    background: rgba(0, 255, 102, 0.1);
    border-color: rgba(0, 255, 102, 0.2);
    color: var(--nothing-green);
}

.alert-danger-nothing {
    background: rgba(255, 51, 51, 0.1);
    border-color: rgba(255, 51, 51, 0.2);
    color: var(--nothing-red);
}

.alert-info-nothing {
    background: rgba(0, 102, 255, 0.1);
    border-color: rgba(0, 102, 255, 0.2);
    color: var(--nothing-blue);
}

/* Session Cards */
.session-card-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--nothing-cyan);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.session-card-nothing:hover {
    transform: translateX(8px);
    box-shadow: var(--glass-shadow), var(--shadow-glow);
    border-left-color: var(--nothing-cyan);
}

.session-card-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 204, 0.5), transparent);
    animation: session-shimmer 3s ease-in-out infinite;
}

@keyframes session-shimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

.session-subject {
    font-family: 'DotGothic16', monospace;
    font-size: 16px;
    color: var(--nothing-cyan);
    margin-bottom: 8px;
}

.session-duration {
    font-size: 14px;
    color: var(--nothing-gray-300);
    margin-bottom: 4px;
}

.session-meta {
    font-size: 12px;
    color: var(--nothing-gray-500);
    display: flex;
    gap: 16px;
    align-items: center;
}

/* Mood Indicators */
.mood-excellent { border-left-color: var(--nothing-green); }
.mood-good { border-left-color: var(--nothing-cyan); }
.mood-fair { border-left-color: var(--nothing-orange); }
.mood-poor { border-left-color: var(--nothing-red); }

/* Progress Circles */
.progress-circle-nothing {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto;
}

.progress-circle-nothing svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
    filter: drop-shadow(0 0 10px currentColor);
}

.progress-circle-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.1);
    stroke-width: 8;
}

.progress-circle-fill {
    fill: none;
    stroke: var(--nothing-cyan);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 2s cubic-bezier(0.4, 0, 0.2, 1);
    animation: progress-glow 3s ease-in-out infinite alternate;
}

@keyframes progress-glow {
    0% { filter: drop-shadow(0 0 5px currentColor); }
    100% { filter: drop-shadow(0 0 15px currentColor); }
}

.progress-circle-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    font-family: 'DotGothic16', monospace;
    color: var(--nothing-cyan);
    font-size: 18px;
}

/* Welcome Section */
.welcome-section-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 48px 32px;
    text-align: center;
    box-shadow: var(--glass-shadow);
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
    animation: ambient-pulse 6s ease-in-out infinite;
}

.welcome-section-nothing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--nothing-cyan), 
        var(--nothing-blue), 
        var(--nothing-purple), 
        transparent
    );
    animation: rainbow-flow 4s linear infinite;
}

@keyframes rainbow-flow {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.welcome-title-nothing {
    font-family: 'DotGothic16', monospace;
    font-size: 2.5rem;
    color: var(--nothing-white);
    margin-bottom: 16px;
    text-shadow: 0 0 30px rgba(0, 255, 204, 0.5);
}

.welcome-subtitle-nothing {
    font-size: 16px;
    color: var(--nothing-gray-300);
    margin-bottom: 32px;
    letter-spacing: 0.02em;
}

/* Footer */
.footer-nothing {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-top: 1px solid var(--glass-border);
    padding: 32px 0;
    margin-top: 64px;
    text-align: center;
    color: var(--nothing-gray-400);
    font-size: 14px;
}

/* Utility Classes */
.text-cyan { color: var(--nothing-cyan); }
.text-green { color: var(--nothing-green); }
.text-red { color: var(--nothing-red); }
.text-orange { color: var(--nothing-orange); }
.text-blue { color: var(--nothing-blue); }
.text-purple { color: var(--nothing-purple); }

.bg-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
}

.border-glass {
    border: 1px solid var(--glass-border);
}

.shadow-glass {
    box-shadow: var(--glass-shadow);
}

.rounded-nothing {
    border-radius: var(--radius-lg);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container-nothing {
        max-width: 100%;
        padding: 0 24px;
    }
}

@media (max-width: 768px) {
    .container-nothing {
        padding: 0 16px;
        margin-top: 80px;
    }
    
    /* Better touch targets for mobile */
    .btn-nothing {
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .pomodoro-orb {
        width: 250px;
        height: 250px;
    }
    
    .pomodoro-time-display {
        font-size: 2.5rem;
    }
    
    .welcome-title-nothing {
        font-size: 1.5rem !important;
        line-height: 1.3;
    }
    
    .welcome-subtitle-nothing {
        font-size: 0.7rem !important;
        line-height: 1.4;
    }
    
    .stats-value-nothing {
        font-size: 1.8rem !important;
    }
    
    .stats-label-nothing {
        font-size: 0.75rem !important;
    }
    
    .stats-card-nothing {
        padding: 16px !important;
        min-height: 100px !important;
    }
    
    .form-nothing {
        padding: 20px;
    }
    
    /* Mobile-friendly swipe tiles */
    .session-card-nothing {
        margin-bottom: 12px;
        padding: 14px !important;
        border-radius: var(--radius-lg);
        transform: none;
        transition: transform var(--transition-fast);
    }
    
    .session-card-nothing:active {
        transform: scale(0.98);
    }
    
    .stats-card-nothing {
        margin-bottom: 16px;
    }
    
    /* Responsive glass cards */
    .glass-card {
        margin-bottom: 20px;
    }
    
    /* Adjust button sizes on mobile */
    .btn-nothing {
        font-size: 0.85rem !important;
        padding: 10px 16px !important;
    }
    
    /* Session subject and duration smaller */
    .session-subject {
        font-size: 0.9rem !important;
    }
    
    .session-duration {
        font-size: 0.85rem !important;
    }
    
    .session-meta {
        font-size: 0.75rem !important;
        flex-wrap: wrap;
    }
    
    /* Better modal sizing on mobile */
    #quickStartModal .glass-card {
        width: 95% !important;
        max-width: 95% !important;
        padding: 24px !important;
        margin: 0 auto;
    }
    
    /* Reduce padding in glass cards */
    .glass-card > div[style*="padding: 24px"] {
        padding: 16px !important;
    }
    
    /* Command interface buttons - better mobile spacing */
    .command-grid .btn-nothing {
        padding: 14px 12px !important;
        font-size: 0.8rem !important;
    }
    
    .command-grid .btn-nothing i {
        font-size: 20px !important;
    }
    
    /* Pomodoro cards mobile */
    .pomodoro-card-small {
        padding: 20px !important;
    }
    
    .pomodoro-card-small h3 {
        font-size: 1rem !important;
    }
    
    .pomodoro-card-small p {
        font-size: 0.8rem !important;
    }
    
    /* Form inputs mobile */
    .form-control-nothing {
        font-size: 16px !important; /* Prevent zoom on iOS */
        padding: 12px 14px !important;
    }
    
    /* Glass card padding mobile */
    .glass-card [style*="padding: 32px"] {
        padding: 20px !important;
    }
    
    /* Stats values in mini grid */
    .stats-grid-mini .stats-value-nothing {
        font-size: 1.3rem !important;
    }
    
    .stats-grid-mini .stats-label-nothing {
        font-size: 0.7rem !important;
    }
}

@media (max-width: 480px) {
    .container-nothing {
        padding: 0 12px;
    }
    
    .pomodoro-orb {
        width: 200px;
        height: 200px;
    }
    
    .pomodoro-time-display {
        font-size: 2rem;
    }
    
    .welcome-section-nothing {
        padding: 24px 16px !important;
    }
    
    .welcome-title-nothing {
        font-size: 1.1rem !important;
    }
    
    .welcome-subtitle-nothing {
        font-size: 0.6rem !important;
        display: none; /* Hide on very small screens */
    }
    
    .form-nothing {
        padding: 16px;
    }
    
    .navbar-nothing {
        top: 8px;
        left: 8px;
        right: 8px;
        padding: 12px;
    }
    
    /* Smaller stats values */
    .stats-value-nothing {
        font-size: 1.5rem !important;
    }
    
    .stats-icon-nothing {
        font-size: 1.2rem !important;
    }
    
    /* Smaller buttons */
    .btn-nothing {
        font-size: 0.75rem !important;
        padding: 10px 12px !important;
    }
    
    /* More compact cards */
    .glass-card {
        margin-bottom: 16px;
    }
    
    .glass-card > div[style*="padding: 24px"] {
        padding: 14px !important;
    }
    
    /* Session cards more compact */
    .session-card-nothing {
        padding: 10px !important;
    }
    
    /* Modal adjustments for very small screens */
    #quickStartModal .glass-card {
        width: 96% !important;
        padding: 20px !important;
    }
    
    #quickStartModal h2 {
        font-size: 1rem !important;
    }
    
    #quickStartModal .form-control-nothing {
        font-size: 0.85rem !important;
        padding: 10px !important;
    }
    
    #quickStartModal label {
        font-size: 0.75rem !important;
    }
    
    /* Command buttons - stack vertically on very small screens */
    .command-grid .btn-nothing {
        padding: 12px 10px !important;
        font-size: 0.75rem !important;
    }
    
    .command-grid .btn-nothing i {
        font-size: 18px !important;
        margin-bottom: 6px !important;
    }
    
    /* Make welcome action buttons stack better */
    .welcome-section-nothing [style*="display: flex"] {
        gap: 8px !important;
    }
    
    .welcome-section-nothing .btn-nothing i {
        display: none; /* Hide icons to save space */
    }
}

/* Dark Theme Override for Bootstrap Components */
.bootstrap-override {
    --bs-body-bg: transparent;
    --bs-body-color: var(--nothing-white);
    --bs-border-color: var(--glass-border);
}

/* Loading Animation */
@keyframes matrix-rain {
    0% { transform: translateY(-100vh); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(100vh); opacity: 0; }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--nothing-black);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    animation: fade-out 1s ease-out 2s forwards;
}

.loading-text {
    font-family: 'DotGothic16', monospace;
    font-size: 24px;
    color: var(--nothing-cyan);
    text-shadow: 0 0 20px var(--nothing-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes fade-out {
    to {
        opacity: 0;
        visibility: hidden;
    }
}
/* Theme Toggle Switch */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 16px;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.theme-toggle:hover {
    background: var(--glass-bg);
    border-color: var(--nothing-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 204, 0.2);
}

html.light-theme .theme-toggle:hover {
    background: rgba(0, 102, 255, 0.08);
    border-color: #0066ff;
    box-shadow: 0 0 20px rgba(0, 102, 255, 0.15);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    display: inline-block;
    transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(20deg);
}