/* Professional Design System - Zebrafish Atlas */

:root {
    /* Color System */
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;
    --blue-950: #172554;

    /* Neutral Colors */
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;
    --neutral-950: #020617;

    /* Accent Colors */
    --accent-indigo: #4f46e5;
    --accent-purple: #7c3aed;
    --accent-sky: #0ea5e9;
    --accent-cyan: #06b6d4;

    /* Semantic Colors */
    --success: #059669;
    --warning: #eab308;
    --error: #dc2626;
    --info: #0ea5e9;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Cabinet Grotesk', var(--font-sans);
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing System */
    --spacing-xxs: 0.25rem;  /* 4px */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    --shadow-blue: 0 4px 15px -3px rgba(37, 99, 235, 0.2);

    /* Z-index */
    --z-negative: -1;
    --z-default: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* Transitions */
    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Container Max Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* Modern Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--neutral-800);
    background-color: var(--neutral-50);
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* Component Base Styles */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition-all);
    cursor: pointer;
    border: none;
    background: none;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
}

.btn:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    color: white;
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-all);
    border: 1px solid var(--neutral-200);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Form Elements */
.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-md);
    transition: var(--transition-all);
    background-color: white;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--blue-400);
    box-shadow: 0 0 0 4px var(--blue-100);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--neutral-700);
}

/* Navigation */
.nav-link {
    position: relative;
    color: var(--neutral-600);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: var(--transition-all);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--blue-500), var(--blue-600));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.nav-link:hover {
    color: var(--blue-600);
}

.nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-link.active {
    color: var(--blue-600);
    font-weight: 500;
}

.nav-link.active::after {
    transform: scaleX(1);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xxs) var(--spacing-xs);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1;
}

.badge-primary {
    background-color: var(--blue-100);
    color: var(--blue-700);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes scaleIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.slide-in {
    animation: slideIn 0.5s ease forwards;
}

.scale-in {
    animation: scaleIn 0.5s ease forwards;
}

/* Page Transition Classes */
.page-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s, transform 0.5s;
}

.page-exit {
    opacity: 1;
}

.page-exit-active {
    opacity: 0;
    transition: opacity 0.5s;
}

/* Utility Classes */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.text-gradient {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
}

.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Responsive Design */
@media (max-width: 640px) {
    html { font-size: 14px; }
}

@media (min-width: 641px) and (max-width: 1024px) {
    html { font-size: 15px; }
}

@media (min-width: 1025px) {
    html { font-size: 16px; }
}