/* ====================================================
   public-shell.css  –  Shared CSS for all public pages
   Source of truth: index.php header/footer/lang/theme
   ==================================================== */

/* ---- Reset ---- */
html {
    overflow-y: scroll;
    scrollbar-gutter: stable;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ---- CSS Variables ---- */
:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --success: #10b981;
    --success-light: #ecfdf5;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-900: #111827;
    --white: #ffffff;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
}

[data-theme="dark"] {
    --gray-50: #0f172a;
    --gray-100: #1e293b;
    --gray-200: #334155;
    --gray-300: #475569;
    --gray-400: #94a3b8;
    --gray-500: #cbd5e1;
    --gray-600: #e2e8f0;
    --gray-700: #f1f5f9;
    --gray-900: #f8fafc;
    --white: #1e293b;
    --success-light: rgba(16,185,129,0.15);
    --success-bg: rgba(16,185,129,0.15);
    --success-border: rgba(16,185,129,0.25);
    --danger-bg: rgba(239,68,68,0.15);
    --danger-border: rgba(239,68,68,0.3);
}

/* ---- Body Base ---- */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    min-height: 100vh;
    min-height: 100dvh;
    color: var(--gray-900);
    display: flex;
    flex-direction: column;
}

/* ---- Header / Nav ---- */
.site-header {
    background: rgba(255,255,255,0.72);
    border-bottom: 1px solid var(--gray-200);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
}
[data-theme="dark"] .site-header {
    background: rgba(15,23,42,0.78);
    box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}
.brand:hover { opacity: 0.88; }
.brand-logo {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(59,130,246,0.25), 0 0 0 1px rgba(59,130,246,0.08);
    transition: transform 0.3s cubic-bezier(.34,1.56,.64,1), box-shadow 0.3s;
}
.brand:hover .brand-logo {
    transform: scale(1.06) rotate(-2deg);
    box-shadow: 0 4px 14px rgba(59,130,246,0.35), 0 0 0 1px rgba(59,130,246,0.12);
}
.brand-logo i { color: #fff; font-size: 16px; }
.brand > img {
    width: 38px !important;
    height: 38px !important;
    object-fit: contain;
    border-radius: 12px !important;
    box-shadow: 0 2px 8px rgba(59,130,246,0.25);
    transition: transform 0.3s cubic-bezier(.34,1.56,.64,1), box-shadow 0.3s;
    flex-shrink: 0;
}
.brand:hover > img {
    transform: scale(1.06) rotate(-2deg);
    box-shadow: 0 4px 14px rgba(59,130,246,0.35);
}
.brand-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.03em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 220px;
}
.brand-name span { color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 8px; }
.header-actions .btn-sm {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.25s ease-out;
    border: none;
    cursor: pointer;
}
.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-900); }
.btn-filled {
    background: var(--primary);
    color: var(--white);
}
.btn-filled:hover { background: var(--primary-dark); box-shadow: 0 2px 10px rgba(59,130,246,0.3); transform: translateY(-1px); }

/* Header nav pills — login / register */
.header-actions > a.btn-sm {
    height: 38px;
    padding: 0 14px !important;
    gap: 7px;
    border-radius: 10px;
    border: 1px solid var(--gray-200);
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    color: var(--gray-500);
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.7);
    white-space: nowrap;
    transition: all 0.3s cubic-bezier(.2,.8,.2,1);
}
.header-actions > a.btn-sm i {
    font-size: 14px;
    flex-shrink: 0;
    transition: transform 0.35s cubic-bezier(.34,1.56,.64,1), color 0.3s;
}
.header-actions > a.btn-sm:hover {
    border-color: rgba(59,130,246,0.35);
    color: var(--primary);
    background: linear-gradient(180deg, var(--white) 0%, rgba(59,130,246,0.03) 100%);
    box-shadow: 0 2px 8px rgba(59,130,246,0.12), 0 0 0 3px rgba(59,130,246,0.06), inset 0 1px 0 rgba(255,255,255,0.8);
    transform: translateY(-0.5px);
}
.header-actions > a.btn-sm:hover i {
    transform: scale(1.08);
}
.header-actions > a.btn-sm:active {
    transform: scale(0.96) translateY(0.5px);
    box-shadow: 0 0 2px rgba(0,0,0,0.08), inset 0 1px 3px rgba(0,0,0,0.06);
    transition-duration: 0.1s;
}
/* Register pill — highlighted primary accent */
.header-actions > a.btn-filled {
    background: linear-gradient(180deg, rgba(59,130,246,0.10) 0%, rgba(59,130,246,0.06) 100%);
    border-color: rgba(59,130,246,0.22);
    color: var(--primary);
    box-shadow: 0 1px 2px rgba(59,130,246,0.10), 0 1px 4px rgba(59,130,246,0.06), inset 0 1px 0 rgba(59,130,246,0.08);
}
.header-actions > a.btn-filled:hover {
    background: linear-gradient(180deg, rgba(59,130,246,0.14) 0%, rgba(59,130,246,0.08) 100%);
    border-color: rgba(59,130,246,0.45);
    color: var(--primary-dark);
    box-shadow: 0 2px 12px rgba(59,130,246,0.20), 0 0 0 3px rgba(59,130,246,0.08), inset 0 1px 0 rgba(59,130,246,0.10);
}
.header-actions > a.btn-filled:active {
    box-shadow: 0 0 2px rgba(59,130,246,0.12), inset 0 1px 3px rgba(59,130,246,0.10);
}
[data-theme="dark"] .header-actions > a.btn-sm {
    border-color: var(--gray-200);
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    color: var(--gray-500);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.04);
}
[data-theme="dark"] .header-actions > a.btn-sm:hover {
    box-shadow: 0 2px 10px rgba(59,130,246,0.18), 0 0 0 3px rgba(59,130,246,0.08), inset 0 1px 0 rgba(255,255,255,0.04);
}
[data-theme="dark"] .header-actions > a.btn-filled {
    background: linear-gradient(180deg, rgba(59,130,246,0.14) 0%, rgba(59,130,246,0.08) 100%);
    border-color: rgba(59,130,246,0.30);
    color: #93c5fd;
    box-shadow: 0 1px 4px rgba(59,130,246,0.15), inset 0 1px 0 rgba(59,130,246,0.10);
}
[data-theme="dark"] .header-actions > a.btn-filled:hover {
    box-shadow: 0 2px 14px rgba(59,130,246,0.25), 0 0 0 3px rgba(59,130,246,0.10), inset 0 1px 0 rgba(59,130,246,0.12);
}

/* ---- Theme Toggle ---- */
#themeToggle {
    width: 38px;
    height: 38px;
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--gray-200) !important;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    color: var(--gray-500);
    font-size: 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.7);
    transition: all 0.3s cubic-bezier(.2,.8,.2,1);
}
#themeToggle:hover {
    border-color: rgba(59,130,246,0.35) !important;
    color: var(--primary);
    background: linear-gradient(180deg, var(--white) 0%, rgba(59,130,246,0.03) 100%);
    box-shadow: 0 2px 8px rgba(59,130,246,0.12), 0 0 0 3px rgba(59,130,246,0.06), inset 0 1px 0 rgba(255,255,255,0.8);
    transform: translateY(-0.5px);
}
#themeToggle:active {
    transform: scale(0.94) translateY(0.5px);
    box-shadow: 0 0 2px rgba(0,0,0,0.08), inset 0 1px 3px rgba(0,0,0,0.06);
    transition-duration: 0.1s;
}
#themeToggle i {
    transition: transform 0.35s cubic-bezier(.34,1.56,.64,1), color 0.3s;
}
#themeToggle:hover i {
    transform: rotate(15deg) scale(1.08);
}
[data-theme="dark"] #themeToggle {
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.04);
}
[data-theme="dark"] #themeToggle:hover {
    box-shadow: 0 2px 10px rgba(59,130,246,0.18), 0 0 0 3px rgba(59,130,246,0.08), inset 0 1px 0 rgba(255,255,255,0.04);
}

/* ---- Language Dropdown ---- */
.lang-dropdown { position: relative; }
.lang-dropdown-btn {
    width: 38px; height: 38px; padding: 0; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 10px; border: 1px solid var(--gray-200);
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    cursor: pointer; font-family: inherit;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.7);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(.2,.8,.2,1);
}
.lang-dropdown-btn:hover {
    border-color: rgba(59,130,246,0.35);
    background: linear-gradient(180deg, var(--white) 0%, rgba(59,130,246,0.03) 100%);
    box-shadow: 0 2px 8px rgba(59,130,246,0.12), 0 0 0 3px rgba(59,130,246,0.06), inset 0 1px 0 rgba(255,255,255,0.8);
    transform: translateY(-0.5px);
}
.lang-dropdown-btn:active { transform: scale(0.94) translateY(0.5px); transition-duration: 0.1s; }
.lang-flag {
    width: 22px;
    height: 16px;
    object-fit: cover;
    border-radius: 2px;
    flex-shrink: 0;
    display: block;
}
.lang-dropdown-btn .lang-flag { opacity: 0.85; transition: opacity 0.2s; }
.lang-dropdown-btn:hover .lang-flag { opacity: 1; }
[data-theme="dark"] .lang-dropdown-btn {
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.04);
}
[data-theme="dark"] .lang-dropdown-btn:hover {
    box-shadow: 0 2px 10px rgba(59,130,246,0.18), 0 0 0 3px rgba(59,130,246,0.08), inset 0 1px 0 rgba(255,255,255,0.04);
}
.lang-dropdown-menu {
    display: none; position: absolute; right: 0; top: calc(100% + 6px); min-width: 170px;
    background: var(--white); border: 1px solid var(--gray-200); border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12); z-index: 200; overflow: hidden;
    animation: langMenuIn 0.18s ease-out;
}
@keyframes langMenuIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }
.lang-dropdown.open .lang-dropdown-menu { display: block; }
.lang-dropdown-menu a {
    display: flex; align-items: center; gap: 10px; padding: 9px 14px; font-size: 13px; font-weight: 600;
    color: var(--gray-600); text-decoration: none; transition: background 0.15s, color 0.15s;
}
.lang-dropdown-menu a:hover { background: var(--gray-100); color: var(--primary); }
.lang-dropdown-menu a.active { color: var(--primary); }
.lang-dropdown-menu a .lang-flag {
    width: 20px;
    height: 14px;
}
.lang-dropdown-menu .lang-list { max-height: 55vh; overflow-y: auto; padding: 4px 0; }
.lang-dropdown-menu .lang-list::-webkit-scrollbar { width: 4px; }
.lang-dropdown-menu .lang-list::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 4px; }
[data-theme="dark"] .lang-dropdown-menu {
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}

/* ---- Footer ---- */
.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--gray-200);
    background: var(--white);
    padding: 20px 24px;
}
.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--gray-400);
}
.footer-links { display: flex; gap: 20px; }
.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--primary); }

/* ---- Auth Content Wrapper (login / register) ---- */
.auth-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 16px;
    position: relative;
}
.auth-content::before {
    content: '';
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
.auth-content::after {
    content: '';
    position: fixed;
    bottom: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139,92,246,0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}
[data-theme="dark"] .auth-content::before {
    background: radial-gradient(circle, rgba(59,130,246,0.10) 0%, transparent 70%);
}
[data-theme="dark"] .auth-content::after {
    background: radial-gradient(circle, rgba(139,92,246,0.08) 0%, transparent 70%);
}

/* ---- Touch helpers ---- */
.header-actions .btn-sm { -webkit-tap-highlight-color: transparent; }
.btn-ghost:active {
    transform: scale(0.96);
    transition-duration: 0.1s;
}
.btn-filled:active {
    transform: translateY(1px) scale(0.97);
    transition-duration: 0.1s;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .site-header { padding: 0 16px; }
    .header-inner { height: 52px; }
    .brand { gap: 10px; }
    .brand-name { font-size: 15px; max-width: 180px; }
    .header-actions { gap: 6px; }
    .header-actions > a.btn-sm { font-size: 0; padding: 0 !important; width: 38px; gap: 0; justify-content: center; overflow: hidden; }
    .header-actions > a.btn-sm i { font-size: 14px; }
    .lang-dropdown-btn { width: 38px; height: 38px; }
}

@media (max-width: 480px) {
    .site-header { padding: 0 12px; }
    .header-inner { height: 48px; }
    .brand { gap: 8px; }
    .brand-logo { width: 34px; height: 34px; border-radius: 10px; }
    .brand-logo i { font-size: 14px; }
    .brand > img { width: 34px !important; height: 34px !important; border-radius: 10px !important; }
    .brand-name { font-size: 14px; max-width: 140px; }
    .header-actions { gap: 5px; }
    #themeToggle { width: 34px; height: 34px; border-radius: 8px; font-size: 14px; }
    .header-actions > a.btn-sm { width: 34px; height: 34px; border-radius: 8px; }
    .header-actions > a.btn-sm i { font-size: 13px; }
    .footer-inner { flex-direction: column; gap: 8px; text-align: center; }
    .lang-dropdown-btn { width: 34px; height: 34px; border-radius: 8px; }
    .lang-dropdown-btn .lang-flag { width: 20px; height: 14px; }
    .lang-dropdown-menu { right: -40px; min-width: 160px; }
    .auth-content { padding: 24px 12px; }
}