/**
 * Nestperts - Coastal Scientific Interface Theme
 * Nature-inspired color system with dark/light modes
 */

:root {
    /* Brand Colors - The Water Institute Teal */
    --brand-primary: #537C8A;
    --brand-primary-hover: #456773;
    --brand-primary-light: #CEE9F4;

    /* Semantic Colors */
    --success: #4a9d5f;
    --warning: #d4a02f;
    --error: #c74a4a;
    --info: #4a7f9d;

    /* Typography Scale */
    --font-display: 'Merriweather', Georgia, serif;
    --font-body: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.24);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index Scale */
    --z-dropdown: 100;
    --z-modal: 200;
    --z-toast: 300;
    --z-tooltip: 400;
}

/* Light Mode (Default) - Coastal Beach Theme */
[data-theme="light"] {
    /* Backgrounds - Beach Sand & Sky */
    --bg-primary: #fdfbf7;
    --bg-secondary: #f5f0e8;
    --bg-tertiary: #ebe3d5;
    --bg-elevated: #ffffff;

    /* Surfaces */
    --surface-base: #ffffff;
    --surface-hover: #f9f6f1;
    --surface-active: #f0ebe2;
    --surface-border: rgba(101, 87, 68, 0.15);

    /* Text - Driftwood & Charcoal */
    --text-primary: #2a2520;
    --text-secondary: #5c5247;
    --text-tertiary: #7f7669;
    --text-disabled: #a8a095;
    --text-inverse: #fdfbf7;

    /* Interactive States */
    --interactive-base: var(--brand-primary);
    --interactive-hover: var(--brand-primary-hover);
    --interactive-active: #b35838;

    /* Overlay */
    --overlay: rgba(42, 37, 32, 0.5);
    --overlay-heavy: rgba(42, 37, 32, 0.75);

    /* Nature Accents */
    --accent-ocean: #537C8A;
    --accent-seagrass: #779373;
    --accent-coastal: #7BABAE;
    --accent-shell: #CEE9F4;
}

/* Dark Mode - Deep Ocean Theme */
[data-theme="dark"] {
    /* Backgrounds - Deep Ocean */
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f26;
    --bg-tertiary: #252b35;
    --bg-elevated: #2a3139;

    /* Surfaces */
    --surface-base: #1a1f26;
    --surface-hover: #252b35;
    --surface-active: #2f3844;
    --surface-border: rgba(255, 255, 255, 0.1);

    /* Text - Moonlight & Sea Foam */
    --text-primary: #e8e6e3;
    --text-secondary: #b8b5b0;
    --text-tertiary: #8a8680;
    --text-disabled: #5c5954;
    --text-inverse: #0f1419;

    /* Interactive States */
    --interactive-base: var(--brand-primary);
    --interactive-hover: var(--brand-primary-light);
    --interactive-active: #e8b896;

    /* Overlay */
    --overlay: rgba(15, 20, 25, 0.6);
    --overlay-heavy: rgba(15, 20, 25, 0.85);

    /* Nature Accents */
    --accent-ocean: #6ba3c7;
    --accent-seagrass: #8db068;
    --accent-coastal: #7BABAE;
    --accent-shell: #CEE9F4;

    /* Enhanced Shadows for Dark Mode */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
}

/* Global Resets & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: background var(--transition-slow), color var(--transition-slow);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: var(--text-5xl); margin-bottom: var(--space-6); }
h2 { font-size: var(--text-4xl); margin-bottom: var(--space-5); }
h3 { font-size: var(--text-3xl); margin-bottom: var(--space-4); }
h4 { font-size: var(--text-2xl); margin-bottom: var(--space-3); }
h5 { font-size: var(--text-xl); margin-bottom: var(--space-3); }
h6 { font-size: var(--text-lg); margin-bottom: var(--space-2); }

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    line-height: 1.7;
}

a {
    color: var(--interactive-base);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--interactive-hover);
}

/* Utility Classes */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-tertiary { color: var(--text-tertiary) !important; }
.text-brand { color: var(--brand-primary) !important; }

.bg-surface { background: var(--surface-base); }
.bg-elevated { background: var(--bg-elevated); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.animate-fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

.animate-slide-in {
    animation: slideIn var(--transition-base) ease-out;
}

/* Stagger animation delays for children */
.stagger-children > * {
    animation: fadeIn var(--transition-slow) ease-out backwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0ms; }
.stagger-children > *:nth-child(2) { animation-delay: 80ms; }
.stagger-children > *:nth-child(3) { animation-delay: 160ms; }
.stagger-children > *:nth-child(4) { animation-delay: 240ms; }
.stagger-children > *:nth-child(5) { animation-delay: 320ms; }
.stagger-children > *:nth-child(6) { animation-delay: 400ms; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-border);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--brand-primary);
    color: white;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
}