/* =============================================================================
   ZEROZENZONE — Public site styles.
   Consumes tokens.css; never hardcode colors here.
============================================================================= */

/* ---------- LAYOUT SHELL ---------- */
.site {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.site-main { flex: 1; }

/* ---------- HEADER ---------- */
.site-header {
    background: var(--color-brand-black);
    color: var(--color-brand-white);
    position: sticky; top: 0;
    z-index: var(--z-sticky);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.site-header .container {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-height);
}
.site-brand {
    display: flex; flex-direction: column; gap: 2px;
    text-decoration: none; color: var(--color-brand-primary);
    font-family: var(--font-display);
}
.site-brand .wordmark {
    font-size: var(--fs-lg); font-weight: var(--fw-bold);
    letter-spacing: var(--ls-tight); line-height: 1;
}
.site-brand .tagline {
    font-family: var(--font-sans); font-size: 10px;
    letter-spacing: var(--ls-wider); text-transform: uppercase;
    color: rgba(255,255,255,0.5);
}
.site-nav { display: flex; gap: var(--space-5); align-items: center; }
.site-nav a {
    color: rgba(255,255,255,0.78);
    font-size: var(--fs-sm); font-weight: var(--fw-medium);
    transition: color var(--transition-fast);
}
.site-nav a:hover { color: var(--color-brand-primary); }
.site-nav a.is-active { color: var(--color-brand-primary); }
.site-nav .btn { padding: var(--space-2) var(--space-4); }
.nav-cart { display: inline-flex; align-items: center; gap: 6px; }
.nav-cart-badge {
    background: var(--color-brand-primary); color: var(--color-brand-black);
    font-size: 11px; font-weight: var(--fw-bold);
    min-width: 18px; height: 18px; border-radius: var(--border-radius-pill);
    display: inline-flex; align-items: center; justify-content: center; padding: 0 5px;
}

.menu-toggle { display: none; color: var(--color-brand-white); font-size: 24px; }

@media (max-width: 860px) {
    .menu-toggle { display: inline-flex; }
    .site-nav { display: none; }
    .site-nav.is-open {
        display: flex; flex-direction: column; position: absolute;
        top: var(--header-height); left: 0; right: 0;
        background: var(--color-brand-black);
        padding: var(--space-4); gap: var(--space-3);
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
}

/* ---------- FOOTER ---------- */
.site-footer {
    background: var(--color-brand-black);
    color: rgba(255,255,255,0.65);
    padding: var(--space-7) 0 var(--space-5);
    margin-top: var(--space-8);
}
.site-footer .footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.4fr;
    gap: var(--space-6); margin-bottom: var(--space-6);
}
@media (max-width: 860px) {
    .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
    .site-footer .footer-grid { grid-template-columns: 1fr; }
}
.site-footer h4 {
    color: var(--color-brand-white);
    font-family: var(--font-sans); font-size: var(--fs-sm);
    text-transform: uppercase; letter-spacing: var(--ls-wider);
    margin-bottom: var(--space-3);
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 4px 0; }
.site-footer a { color: rgba(255,255,255,0.65); font-size: var(--fs-sm); }
.site-footer a:hover { color: var(--color-brand-primary); }
.site-footer .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: var(--space-4);
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3);
    font-size: var(--fs-xs);
}

/* ---------- FLASH MESSAGES ---------- */
.flash {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-4);
    font-size: var(--fs-sm);
    border: 1px solid;
}
.flash-success { background: var(--color-success-bg);  color: var(--color-success); border-color: var(--color-success-border); }
.flash-error   { background: var(--color-danger-bg);   color: var(--color-danger);  border-color: var(--color-danger); }
.flash-info    { background: var(--color-info-bg);     color: var(--color-info);    border-color: var(--color-info); }
.flash-warning { background: var(--color-warning-bg);  color: var(--color-warning); border-color: var(--color-warning); }

/* ---------- HERO ---------- */
.hero {
    background: var(--color-brand-black);
    color: var(--color-brand-white);
    padding: var(--space-8) 0;
    position: relative; overflow: hidden;
}
.hero::before {
    content: ""; position: absolute;
    right: -180px; top: -180px;
    width: 480px; height: 480px; border-radius: 50%;
    background: var(--color-brand-primary); opacity: 0.18;
    filter: blur(20px);
}
.hero-inner { position: relative; max-width: 720px; }
.hero-eyebrow {
    color: var(--color-brand-primary);
    text-transform: uppercase; letter-spacing: var(--ls-wider);
    font-size: var(--fs-sm); font-weight: var(--fw-semibold);
    margin-bottom: var(--space-3);
}
.hero h1 {
    color: var(--color-brand-white);
    font-size: var(--fs-hero); font-weight: var(--fw-bold);
    line-height: var(--lh-tight); letter-spacing: var(--ls-tight);
    margin-bottom: var(--space-4);
}
.hero p {
    color: rgba(255,255,255,0.8);
    font-size: var(--fs-md);
    max-width: 580px;
    margin-bottom: var(--space-5);
}
.hero-cta { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ---------- SECTIONS ---------- */
.section { padding: var(--space-7) 0; }
.section-dark { background: var(--color-background-secondary); }
.section-title { text-align: center; margin-bottom: var(--space-6); }
.section-title .eyebrow {
    color: var(--color-text-tertiary);
    text-transform: uppercase; letter-spacing: var(--ls-wider);
    font-size: var(--fs-xs); font-weight: var(--fw-semibold);
    margin-bottom: var(--space-2);
}
.section-title h2 { font-size: var(--fs-3xl); }

/* ---------- BOOK CARD ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-5); }
.book-card .cover {
    aspect-ratio: 3/4;
    background: var(--color-background-secondary);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-3);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-text-tertiary); font-size: var(--fs-sm);
    overflow: hidden;
}
.book-card .cover img { width: 100%; height: 100%; object-fit: cover; }
.book-card h3 {
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    margin-bottom: var(--space-1);
}
.book-card .author { color: var(--color-text-tertiary); font-size: var(--fs-sm); margin-bottom: var(--space-3); }
.book-card .row { display: flex; align-items: center; justify-content: space-between; }
.book-card .price { font-size: var(--fs-lg); font-weight: var(--fw-bold); }

/* ---------- CATEGORY TILES ---------- */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--space-4); }
.category-tile {
    background: var(--color-background-primary);
    border: 1px solid var(--color-border-tertiary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-5);
    text-align: center;
    transition: all var(--transition-base);
    color: var(--color-text-primary);
    text-decoration: none;
}
.category-tile:hover {
    border-color: var(--color-brand-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
    color: var(--color-text-primary);
}
.category-tile .name { font-weight: var(--fw-semibold); font-size: var(--fs-md); }

/* ---------- AUTH PAGES ---------- */
.auth-shell {
    min-height: calc(100vh - var(--header-height) - var(--footer-min-height));
    display: grid; place-items: center;
    padding: var(--space-7) var(--space-4);
}
.auth-card {
    width: 100%; max-width: 440px;
    background: var(--color-background-primary);
    border: 1px solid var(--color-border-tertiary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-md);
}
.auth-card h1 { font-size: var(--fs-2xl); margin-bottom: var(--space-2); }
.auth-card > p { color: var(--color-text-secondary); margin-bottom: var(--space-5); font-size: var(--fs-sm); }
.auth-field { margin-bottom: var(--space-4); }
.auth-foot { margin-top: var(--space-4); text-align: center; font-size: var(--fs-sm); color: var(--color-text-tertiary); }
.auth-foot a { font-weight: var(--fw-medium); color: var(--color-text-primary); }
.auth-foot a:hover { color: var(--color-brand-primary); }

/* ---------- CONTENT PAGE (About / Terms / Privacy / Contact) ---------- */
.content-page {
    max-width: 720px; margin: 0 auto;
    font-size: var(--fs-base); line-height: var(--lh-relaxed);
    color: var(--color-text-secondary);
}
.content-page .lead {
    font-size: var(--fs-lg); color: var(--color-text-primary);
    font-weight: var(--fw-medium); margin-bottom: var(--space-4);
}
.content-page h2 {
    font-family: var(--font-display); font-size: var(--fs-xl);
    color: var(--color-text-primary);
    margin: var(--space-6) 0 var(--space-3);
}
.content-page h3 {
    font-family: var(--font-display); font-size: var(--fs-lg);
    color: var(--color-text-primary);
    margin: var(--space-5) 0 var(--space-2);
}
.content-page p { margin-bottom: var(--space-4); }
.content-page ul { margin: 0 0 var(--space-4) var(--space-5); }
.content-page li { margin-bottom: var(--space-1); }
.content-page a { color: var(--color-brand-primary-hover); font-weight: var(--fw-medium); }
.content-page strong { color: var(--color-text-primary); }

/* ---------- PAGE HEADER (account/inner) ---------- */
.page-header {
    padding: var(--space-7) 0 var(--space-5);
    border-bottom: 1px solid var(--color-border-tertiary);
    margin-bottom: var(--space-6);
}
.page-header h1 { font-size: var(--fs-3xl); }
.page-header .eyebrow {
    color: var(--color-text-tertiary);
    text-transform: uppercase; letter-spacing: var(--ls-wider);
    font-size: var(--fs-xs); font-weight: var(--fw-semibold);
    margin-bottom: var(--space-2);
}