/**
 * HippiquX - Design System
 * Inspired by cil.com : editorial, dramatic typography, alternating sections
 */

:root {
    /* Neutrals */
    --black: #0a0a0a;
    --ink: #171717;
    --gray-900: #171717;
    --gray-800: #262626;
    --gray-700: #404040;
    --gray-600: #525252;
    --gray-500: #737373;
    --gray-400: #a3a3a3;
    --gray-300: #d4d4d4;
    --gray-200: #e5e5e5;
    --gray-100: #f5f5f5;
    --gray-50:  #fafafa;
    --white: #ffffff;
    --off-white: #fafaf7;

    /* Greens (turf accent) */
    --green-50:  #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --green-800: #166534;
    --green-900: #14532d;

    /* Signal colors */
    --red-50:  #fef2f2;
    --red-500: #ef4444;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    --amber-50:  #fffbeb;
    --amber-500: #f59e0b;
    --amber-700: #b45309;

    /* Semantic - LIGHT */
    --bg: var(--white);
    --bg-alt: var(--off-white);
    --bg-subtle: var(--gray-100);
    --text: var(--ink);
    --text-muted: var(--gray-500);
    --text-soft: var(--gray-600);
    --border: rgba(0,0,0,0.08);
    --border-strong: rgba(0,0,0,0.16);
    --accent: var(--green-600);
    --accent-hover: var(--green-700);
    --accent-soft: var(--green-50);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Fraunces', 'Times New Roman', Georgia, serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

    /* Sizes */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --max-content: 1320px;
    --max-narrow: 720px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
    --shadow: 0 4px 16px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.02);
    --shadow-lg: 0 24px 48px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-xl: 0 32px 64px rgba(0,0,0,0.1);

    /* Transitions */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --transition: 250ms var(--ease);
    --transition-slow: 500ms var(--ease);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.5;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'ss01', 'ss03', 'cv11';
    overflow-x: hidden;
}

/* ============================
   TYPOGRAPHY (editorial)
   ============================ */

.display {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: -0.03em;
    line-height: 0.95;
}
.display-xl {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(3rem, 9vw, 8rem);
    line-height: 0.92;
    letter-spacing: -0.045em;
}
.display-lg {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(2.5rem, 6vw, 5rem);
    line-height: 0.98;
    letter-spacing: -0.035em;
}
.display-md {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: clamp(2rem, 4vw, 3.5rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
}
.italic-accent {
    font-style: italic;
    font-family: var(--font-display);
}

h1 { font-family: var(--font-display); font-weight: 400; font-size: clamp(2.25rem, 5vw, 4rem); letter-spacing: -0.035em; line-height: 1.02; }
h2 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.75rem, 3.5vw, 2.75rem); letter-spacing: -0.025em; line-height: 1.08; }
h3 { font-family: var(--font-sans); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em; line-height: 1.3; }
h4 { font-family: var(--font-sans); font-weight: 600; font-size: 1rem; letter-spacing: -0.005em; }

p { font-size: 1rem; line-height: 1.6; }
p.lead {
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
    line-height: 1.55;
    color: var(--text-soft);
    font-weight: 400;
}

.eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.eyebrow-dot::before {
    content: '';
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
    margin-right: 0.6rem;
    vertical-align: middle;
    box-shadow: 0 0 0 4px var(--accent-soft);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition), opacity var(--transition);
}

/* ============================
   LAYOUT
   ============================ */

.container {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 0 2rem;
}
.container-narrow {
    max-width: var(--max-narrow);
    margin: 0 auto;
    padding: 0 2rem;
}
.container-wide {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: clamp(4rem, 8vw, 8rem) 0;
    position: relative;
}
.section-sm { padding: clamp(2.5rem, 5vw, 4.5rem) 0; }

/* Dark section */
.section-dark {
    background: var(--ink);
    color: var(--white);
}
.section-dark h1,
.section-dark h2,
.section-dark h3 { color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.72); }
.section-dark .eyebrow { color: rgba(255,255,255,0.55); }

.section-cream { background: var(--off-white); }
.section-green {
    background: var(--accent);
    color: var(--white);
}
.section-green h1,
.section-green h2 { color: var(--white); }

/* ============================
   HEADER
   ============================ */

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1.25rem 2rem;
    background: rgba(255,255,255,0.7);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}
.site-header.on-dark {
    background: rgba(10,10,10,0.5);
    border-bottom-color: rgba(255,255,255,0.08);
    color: var(--white);
}
body.has-fixed-header { padding-top: 72px; }

.header-inner {
    max-width: var(--max-content);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text);
}
.brand .logo-mark {
    width: 32px; height: 32px;
    background: var(--ink);
    color: var(--white);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 500;
}
.on-dark .brand { color: var(--white); }
.on-dark .brand .logo-mark { background: var(--white); color: var(--ink); }

.nav {
    display: flex;
    align-items: center;
    gap: 2.25rem;
}
.nav a {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-soft);
    position: relative;
    padding: 0.3rem 0;
}
.nav a:hover { color: var(--text); }
.nav a.active { color: var(--text); }
.nav a.active::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -4px;
    height: 1px;
    background: var(--accent);
}
.on-dark .nav a { color: rgba(255,255,255,0.65); }
.on-dark .nav a:hover, .on-dark .nav a.active { color: var(--white); }
.on-dark .nav a.active::after { background: var(--accent); }

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}
.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.35rem 0.85rem 0.35rem 0.4rem;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
}
.user-chip:hover { background: var(--bg-alt); }
.user-chip .avatar {
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
}
.on-dark .user-chip { color: var(--white); border-color: rgba(255,255,255,0.24); }
.on-dark .user-chip:hover { background: rgba(255,255,255,0.08); }
.on-dark .user-chip .avatar { background: var(--white); color: var(--ink); }

.logout-link {
    font-size: 0.82rem;
    color: var(--text-muted);
}
.logout-link:hover { color: var(--red-600); }
.on-dark .logout-link { color: rgba(255,255,255,0.55); }
.on-dark .logout-link:hover { color: #fca5a5; }

/* ============================
   BUTTONS (editorial)
   ============================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.6rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-family: inherit;
    font-size: 0.92rem;
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.005em;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary {
    background: var(--ink);
    color: var(--white);
    border-color: var(--ink);
}
.btn-primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}
.btn-accent {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}
.btn-accent:hover {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--white);
}
.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border-strong);
}
.btn-outline:hover {
    border-color: var(--ink);
    background: var(--ink);
    color: var(--white);
}
.section-dark .btn-outline {
    color: var(--white);
    border-color: rgba(255,255,255,0.28);
}
.section-dark .btn-outline:hover {
    background: var(--white);
    color: var(--ink);
}
.btn-lg { padding: 1.1rem 2rem; font-size: 1rem; }
.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.82rem; }
.btn-block { width: 100%; }

.btn-arrow::after {
    content: '→';
    transition: transform var(--transition);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* Text link */
.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text);
    border-bottom: 1px solid var(--text);
    padding-bottom: 1px;
    transition: color var(--transition), border-color var(--transition);
}
.text-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.text-link::after {
    content: '→';
    transition: transform var(--transition);
}
.text-link:hover::after { transform: translateX(3px); }

/* ============================
   FORMS
   ============================ */

.form-group { margin-bottom: 1.25rem; }
.form-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}
.form-input, .form-select {
    width: 100%;
    padding: 1rem 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-strong);
    font-family: inherit;
    font-size: 1.05rem;
    color: var(--text);
    transition: border-color var(--transition);
}
.form-input:focus, .form-select:focus {
    outline: none;
    border-bottom-color: var(--ink);
}
.form-input::placeholder { color: var(--gray-400); }
.form-input.boxed, .form-select.boxed {
    padding: 0.8rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
}
.form-input.boxed:focus, .form-select.boxed:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(22,163,74,0.1);
}

/* ============================
   ALERTS / CHIPS
   ============================ */

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    border: 1px solid;
    margin-bottom: 1rem;
}
.alert-error { background: var(--red-50); color: var(--red-700); border-color: #fecaca; }
.alert-success { background: var(--green-50); color: var(--green-800); border-color: var(--green-200); }
.alert-info { background: var(--amber-50); color: var(--amber-700); border-color: #fde68a; }

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: var(--bg-alt);
    color: var(--text);
    border: 1px solid var(--border);
}
.chip-green { background: var(--green-50); color: var(--green-800); border-color: var(--green-200); }
.chip-red { background: var(--red-50); color: var(--red-700); border-color: #fecaca; }
.chip-amber { background: var(--amber-50); color: var(--amber-700); border-color: #fde68a; }
.chip-dark { background: var(--ink); color: var(--white); border-color: var(--ink); }

/* ============================
   UTILITIES
   ============================ */

.text-muted { color: var(--text-muted); }
.text-soft { color: var(--text-soft); }
.text-accent { color: var(--accent); }
.text-red { color: var(--red-600); }
.text-center { text-align: center; }
.font-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.25rem; }

.divider {
    height: 1px;
    background: var(--border);
    margin: 4rem 0;
}
.section-dark .divider { background: rgba(255,255,255,0.12); }

/* Reveal on scroll */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 800ms var(--ease), transform 800ms var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* Cursor blink for text */
@keyframes blink { 50% { opacity: 0; } }
.cursor-blink::after {
    content: '_';
    color: var(--accent);
    animation: blink 1s steps(1) infinite;
    margin-left: 2px;
}