/* =====================================================
   EDITORIAL MINIMALISM & MODERN RETRO-ILLUSTRATION
   Design System - Core Styles
   ===================================================== */

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color Palette - Muted Retro */
    --color-paper: #F5F2EA;
    --color-paper-dark: #F0EDE3;
    --color-ink: #2C2820;
    --color-ink-light: #5A544C;
    --color-ink-lighter: #78736B;

    --color-accent-orange: #D97845;
    --color-accent-orange-light: #E89560;
    --color-accent-blue: #7B9CAF;
    --color-accent-blue-light: #A8C5D8;

    --color-border: #E0DCD0;
    --color-border-dark: #CCC7B8;

    /* Typography Scale */
    --font-display: 'Playfair Display', 'Georgia', 'Times New Roman', serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;

    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.5rem;       /* 24px */
    --font-size-2xl: 2rem;        /* 32px */
    --font-size-3xl: 2.5rem;      /* 40px */
    --font-size-4xl: 3.5rem;      /* 56px */

    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-pill: 999px;

    /* Shadows - Soft & Subtle */
    --shadow-sm: 0 1px 3px rgba(44, 40, 32, 0.08);
    --shadow-md: 0 4px 12px rgba(44, 40, 32, 0.1);
    --shadow-lg: 0 8px 24px rgba(44, 40, 32, 0.12);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Typography Imports */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* Body & Base Styles */
body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-ink);
    background-color: var(--color-paper);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow-x: hidden;
}

/* Subtle Grain Texture Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='2.5' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
    opacity: 0.5;
    pointer-events: none;
    z-index: 9999;
}

/* Typography Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-ink);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    margin-bottom: var(--space-lg);
}

h2 {
    font-size: var(--font-size-3xl);
    margin-top: var(--space-2xl);
}

h3 {
    font-size: var(--font-size-2xl);
    margin-top: var(--space-xl);
}

h4 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-lg);
}

p {
    margin-bottom: var(--space-md);
    letter-spacing: 0.01em;
    max-width: 70ch;
}

a {
    color: var(--color-accent-orange);
    text-decoration: none;
    transition: color var(--transition-fast);
    border-bottom: 1px solid var(--color-accent-orange-light);
}

a:hover {
    color: var(--color-accent-orange-light);
    border-bottom-color: var(--color-accent-orange);
}

strong {
    font-weight: 600;
    color: var(--color-ink);
}

em {
    font-style: italic;
    color: var(--color-ink-light);
}

/* Lists */
ul, ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

li {
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

ul {
    list-style: none;
}

ul > li::before {
    content: "•";
    color: var(--color-accent-orange);
    font-weight: bold;
    display: inline-block;
    width: 1.5em;
    margin-left: -1.5em;
}

/* Layout Components */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.container-narrow {
    max-width: 700px;
}

.container-wide {
    max-width: 1200px;
}

/* Navigation - Minimal Style */
.nav-minimal {
    position: fixed;
    top: 0;
    right: 0;
    padding: var(--space-md);
    z-index: 1000;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-minimal.hidden {
    transform: translateY(-100%);
    opacity: 0;
}

/* Hamburger Toggle Button */
.nav-toggle {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0;
}

.nav-toggle:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
}

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

.nav-toggle-line {
    width: 16px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle.active .nav-toggle-line:first-child {
    transform: rotate(45deg) translateY(7px);
}

.nav-toggle.active .nav-toggle-line:last-child {
    transform: rotate(-45deg) translateY(-7px);
}

/* Menu Dropdown */
.nav-menu {
    position: absolute;
    top: 50px;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-xs);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-link {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-ink-light);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border: none;
    letter-spacing: 0.02em;
    text-decoration: none;
}

.nav-link:hover {
    background: var(--color-paper-dark);
    color: var(--color-ink);
    border: none;
}

.nav-link:active {
    transform: scale(0.96);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-3xl) 0;
    margin-bottom: var(--space-2xl);
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-ink-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: var(--font-size-xl);
    font-weight: 400;
    color: var(--color-ink-light);
    letter-spacing: 0.03em;
    margin: 0 auto;
    max-width: 600px;
}

/* Cards & Sections */
.card {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.section {
    margin-bottom: var(--space-3xl);
}

/* Dividers - Minimalist Line Work */
.divider {
    height: 1px;
    background: linear-gradient(to right,
        transparent,
        var(--color-border-dark) 20%,
        var(--color-border-dark) 80%,
        transparent
    );
    margin: var(--space-2xl) 0;
    border: none;
}

.divider-thick {
    height: 2px;
    background: var(--color-border-dark);
}

/* Buttons */
.btn {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: 600;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-pill);
    border: 2px solid var(--color-ink);
    background: transparent;
    color: var(--color-ink);
    cursor: pointer;
    transition: all var(--transition-base);
    letter-spacing: 0.02em;
    text-align: center;
}

.btn:hover {
    background: var(--color-ink);
    color: var(--color-paper);
    border-color: var(--color-ink);
}

.btn-primary {
    background: var(--color-accent-orange);
    border-color: var(--color-accent-orange);
    color: white;
}

.btn-primary:hover {
    background: var(--color-accent-orange-light);
    border-color: var(--color-accent-orange-light);
    color: white;
}

/* Badges & Pills */
.badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-pill);
    background: var(--color-accent-blue-light);
    color: var(--color-ink);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Footer */
.footer {
    margin-top: var(--space-3xl);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-ink-lighter);
    font-size: var(--font-size-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

/* Metadata Styles */
.meta {
    font-size: var(--font-size-sm);
    color: var(--color-ink-lighter);
    font-style: italic;
    margin-bottom: var(--space-lg);
}

/* Content Blocks */
.content-block {
    margin-bottom: var(--space-xl);
}

.content-block h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
    }

    .container {
        padding: var(--space-lg) var(--space-md);
    }

    .nav-minimal {
        padding: 12px;
    }

    .nav-toggle {
        width: 44px;
        height: 44px;
    }

    .hero {
        padding: var(--space-2xl) 0;
    }

    .card {
        padding: var(--space-lg);
    }

    /* Better touch targets for mobile */
    a, button, .btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-3xl: 3rem;
        --space-2xl: 2.5rem;
        --space-xl: 2rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

    h1 {
        font-size: var(--font-size-3xl);
        letter-spacing: -0.01em;
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .container {
        padding: var(--space-md) var(--space-sm);
    }

    .nav-minimal {
        padding: 10px;
    }

    .nav-toggle {
        width: 40px;
        height: 40px;
    }

    .nav-toggle-line {
        width: 14px;
    }

    .nav-menu {
        min-width: 120px;
        top: 45px;
    }

    .nav-link {
        font-size: 13px;
        padding: 8px 12px;
    }
}

/* Print Styles */
@media print {
    body::before {
        display: none;
    }

    .nav-minimal,
    .footer-links {
        display: none;
    }

    .container {
        max-width: 100%;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-ink: #000000;
        --color-paper: #FFFFFF;
        --color-border: #000000;
    }

    .card {
        border: 2px solid var(--color-ink);
    }
}