/* ============================================================
   Shared layout — header, theme vars, base reset
   Included by includes/header.php on every page
   ============================================================ */

:root {
    --bg: #0b0d12;
    --bg-elev: #121520;
    --bg-card: #161a27;
    --border: #222738;
    --text: #e7ebf5;
    --text-muted: #8b93a7;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-soft: rgba(59, 130, 246, 0.12);
    --accent-border: rgba(59, 130, 246, 0.3);
    --accent-glow: rgba(59, 130, 246, 0.32);
    --success: #10b981;
    --danger: #ef4444;
    --radius: 14px;
}
:root[data-theme="light"] {
    --bg: #f8fafc;
    --bg-elev: #ffffff;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent-soft: rgba(59, 130, 246, 0.08);
    --accent-border: rgba(59, 130, 246, 0.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a { color: inherit; text-decoration: none; }

/* ---- Header ---- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 13, 18, 0.8);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}
:root[data-theme="light"] .site-header {
    background: rgba(255, 255, 255, 0.85);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    width: 100%;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
.sidebar-toggle-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 34px;
    height: 34px;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.15s ease;
    flex-shrink: 0;
}
.sidebar-toggle-btn:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}
.logo-mark {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    background: var(--accent);
    display: inline-grid;
    place-items: center;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 800;
}
.header-nav {
    display: flex;
    gap: 12px;
    align-items: center;
}
.header-nav a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.88rem;
    transition: color 0.15s ease;
}
.header-nav a:hover { color: var(--text); }
.theme-toggle {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    color: var(--text);
    width: 34px;
    height: 34px;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}
.theme-toggle:hover {
    background: var(--accent-soft);
    border-color: var(--accent);
}

/* User pill (for pages with login) */
.user-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    transition: border-color .15s, background .15s;
}
.user-pill:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}
.user-pill img {
    width: 22px;
    height: 22px;
    border-radius: 50%;
}

/* Login / nav action buttons in header */
.nav-btn {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: border-color .15s, background .15s, color .15s;
}
.nav-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.nav-btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.nav-btn-primary:hover {
    background: var(--accent);
    color: #fff;
    filter: brightness(1.1);
}
@media (max-width: 640px) {
    .user-pill span { display: none; }
    .user-pill { padding: 5px; }
}

/* Login modal */
.login-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.55);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-modal.open { display: flex; }
.login-modal-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px 28px 24px;
    width: 100%;
    max-width: 380px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,.4);
    animation: login-modal-in .18s ease-out;
}
@keyframes login-modal-in { from { transform: translateY(10px); opacity: 0; } to { transform: none; opacity: 1; } }
.login-modal-card h3 {
    font-size: 1.15rem;
    font-weight: 800;
    margin: 8px 0 4px;
}
.login-modal-card p {
    color: var(--text-muted);
    font-size: .85rem;
    margin: 0;
}
.login-modal-logo {
    display: inline-flex;
    width: 52px; height: 52px;
    align-items: center; justify-content: center;
    background: var(--accent);
    color: #fff;
    font-weight: 800;
    border-radius: 14px;
    font-size: 1.6rem;
    margin-bottom: 6px;
}
.login-modal-logo .logo-mark { color: #fff; }
.login-modal-fineprint {
    margin-top: 18px !important;
    font-size: .72rem !important;
    color: var(--text-muted);
}
.login-modal-fineprint a { color: var(--accent); text-decoration: none; }
.login-modal-close {
    position: absolute;
    top: 10px; right: 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: inherit;
}
.login-modal-close:hover { background: var(--bg-elev); color: var(--text); }

/* ---- Footer ---- */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 24px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
}
.site-footer a { color: var(--text); font-weight: 500; }

/* ---- Favorite button & section ---- */
.fav-btn {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-elev, #1a1d29);
    border: 1.5px solid var(--border);
    color: #fbbf24;
    cursor: pointer;
    display: grid;
    place-items: center;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    transition: color .15s ease, background .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
    z-index: 2;
}
.fav-btn:hover {
    color: #f59e0b;
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.15);
    transform: scale(1.08);
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}
.fav-btn.active {
    color: #f59e0b;
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.18);
    box-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
}
.fav-btn.active .fav-star { transform: scale(1.1); }
.fav-btn:active { transform: scale(0.92); }
.fav-btn:disabled { opacity: 0.5; cursor: wait; }
.fav-star { display: inline-block; transition: transform .15s ease; font-size: 1.15rem; }

/* Fav button on tool page (top-right of header) */
.tool-head { position: relative; }
.fav-btn.fav-btn-tool {
    position: absolute;
    top: 0;
    right: 0;
    left: auto;
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
}
.fav-btn.fav-btn-tool .fav-star { font-size: 1.4rem; }

.fav-section { margin-bottom: 28px; }
.fav-section-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text);
    letter-spacing: -0.01em;
}