/* Site chrome only. Chess boards keep style.css / chessboard.js sizing. */

:root {
    --color-bg: #f3f0ea;
    --color-white: #fffdf9;
    --color-light-gray: #ebe4d8;
    --color-medium-gray: #cfc4b3;
    --color-dark-gray: #6b6358;
    --color-text: #1c1916;
    --color-accent: #b58863;
    --color-accent-dark: #8d6240;
    --color-border: rgba(28, 25, 22, 0.09);
    --color-inverse-bg: #1c1916;
    --color-inverse-text: #fffdf9;
    --color-success: #059669;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 2px rgba(28, 25, 22, 0.05);
    --shadow-md: 0 10px 28px rgba(28, 25, 22, 0.08);
    --shadow-lg: 0 18px 44px rgba(28, 25, 22, 0.12);
    --font-display: 'Inter', ui-sans-serif, system-ui, sans-serif;
    --font-heading: 'Inter', ui-sans-serif, system-ui, sans-serif;
    --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
}

[data-theme="dark"] {
    --color-bg: #0e141b;
    --color-white: #161e27;
    --color-light-gray: #243040;
    --color-medium-gray: #3c4d60;
    --color-dark-gray: #9aa8b6;
    --color-text: #eef3f8;
    --color-accent: #d4a574;
    --color-accent-dark: #e2bc90;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-inverse-bg: #f8fafc;
    --color-inverse-text: #0f172a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.38);
    --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.48);
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body,
button,
input,
select,
textarea {
    font-family: var(--font-body);
}

body {
    letter-spacing: -0.011em;
}

h1, h2, h3,
.logo .logo-text,
.page-hero h1,
.page-hero h2,
.seo-content h2 {
    letter-spacing: -0.03em;
}

/* Header */
.header {
    background: rgba(255, 253, 249, 0.82);
    backdrop-filter: blur(18px) saturate(1.35);
    -webkit-backdrop-filter: blur(18px) saturate(1.35);
    border-bottom: 1px solid var(--color-border);
    box-shadow: none;
    padding: 0.6rem 1.25rem;
}

[data-theme="dark"] .header {
    background: rgba(14, 20, 27, 0.78);
}

.logo .logo-text {
    font-weight: 700;
    font-size: 1.42rem;
}

.logo-icon {
    font-size: 1.7rem;
}

.nav-tabs {
    gap: 0.28rem;
    padding: 0.2rem;
    background: rgba(28, 25, 22, 0.04);
    border-radius: 999px;
}

[data-theme="dark"] .nav-tabs {
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab {
    border: 1px solid transparent;
    background: transparent;
    border-radius: 999px;
    padding: 0.48rem 0.95rem;
    font-size: 0.86rem;
    font-weight: 500;
    box-shadow: none;
}

.nav-tab:hover {
    background: rgba(181, 136, 99, 0.14);
    border-color: transparent;
    color: var(--color-text);
}

.nav-tab.active {
    background: var(--color-text);
    color: #fffdf9;
    border-color: var(--color-text);
    box-shadow: none;
}

[data-theme="dark"] .nav-tab.active {
    background: #f8fafc;
    color: #0f172a;
    border-color: #f8fafc;
}

.dark-mode-toggle {
    width: 2.35rem;
    height: 2.35rem;
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.55);
    box-shadow: none;
}

[data-theme="dark"] .dark-mode-toggle {
    background: rgba(255, 255, 255, 0.06);
    color: #e5e7eb;
}

.dark-mode-toggle:hover {
    border-color: var(--color-accent);
    transform: none;
    box-shadow: var(--shadow-sm);
}

.header-tools-menu {
    border: 1px solid var(--color-border) !important;
    border-radius: 16px !important;
    box-shadow: var(--shadow-md) !important;
    backdrop-filter: blur(16px);
}

.mobile-menu-toggle {
    border: 1px solid var(--color-border);
    border-radius: 999px;
}

@media (max-width: 768px) {
    .nav-tabs {
        border-radius: 0 0 16px 16px;
        background: var(--color-white);
        padding: 0.65rem;
    }

    .nav-tab {
        border-radius: 12px;
    }
}

/* Panels & cards */
.panel-section,
.panel-card {
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
}

.control-btn {
    border-radius: 12px;
}

.seo-content {
    background: transparent;
    border-top: 1px solid var(--color-border);
}

.seo-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
}

.seo-card:hover {
    transform: translateY(-2px);
    border-color: rgba(181, 136, 99, 0.45);
    box-shadow: var(--shadow-md);
}

.seo-content h2 {
    font-size: clamp(1.5rem, 2.2vw, 2rem);
}

.page-hero h2,
.page-hero h1 {
    letter-spacing: -0.03em;
}

#about details {
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: var(--color-white) !important;
}

[data-theme="dark"] #about details {
    background: var(--color-white) !important;
}

/* Footer */
.footer {
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: 1.75rem 1.25rem 1.5rem;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.35rem 1rem;
    margin-top: 0.85rem;
}

.footer-links a {
    font-weight: 500;
    color: var(--color-text) !important;
    opacity: 0.72;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent-dark) !important;
    text-decoration: none;
}

.gtranslate_wrapper {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.4rem 0.55rem;
    margin-top: 1rem;
}

.gtranslate_wrapper a,
.gtranslate_wrapper span {
    font-size: 0.82rem;
}

/* Hero buttons on homepage */
.hero-btn {
    border-radius: 999px !important;
    padding: 0.62rem 1.15rem !important;
    min-width: 0 !important;
}

.hero-btn-primary {
    box-shadow: 0 10px 24px rgba(141, 98, 64, 0.28) !important;
}

.hero-trust {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(181, 136, 99, 0.1);
    font-size: 0.82rem !important;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.65rem;
    padding: 0.28rem 0.7rem;
    border-radius: 999px;
    background: rgba(181, 136, 99, 0.14);
    color: var(--color-accent-dark);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

[data-theme="dark"] .hero-eyebrow {
    color: var(--color-accent);
    background: rgba(212, 165, 116, 0.14);
}

.auth-body,
.account-body {
    background: var(--color-bg);
}

.auth-page,
.account-page {
    max-width: 920px;
    margin: 2rem auto 4rem;
    padding: 0 1rem;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.auth-card,
.account-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 1.4rem 1.7rem;
}

.account-page > .account-card {
    margin-bottom: 1rem;
}

.auth-card {
    max-width: 440px;
    margin: 0 auto;
}

.auth-lead {
    color: var(--color-dark-gray);
    margin: 0.4rem 0 1.1rem;
    line-height: 1.5;
}

.auth-alert {
    background: rgba(220, 38, 38, 0.08);
    color: #b91c1c;
    border-radius: 10px;
    padding: 0.7rem 0.85rem;
    font-size: 0.9rem;
}

.auth-social {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.auth-social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    height: 2.7rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-text);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.92rem;
}

.auth-social-btn svg {
    width: 1.15rem;
    height: 1.15rem;
}

.auth-social-btn.google {
    background: #fff;
    color: #1f2937;
    border-color: #dadce0;
}

.auth-social-btn.apple {
    background: #111;
    color: #fff;
    border-color: #111;
}

.auth-social-btn.facebook {
    background: #1877f2;
    color: #fff;
    border-color: #1877f2;
}

.auth-social-btn.is-disabled {
    opacity: 0.45;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.15rem 0 0.9rem;
    color: var(--color-dark-gray);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.auth-divider::before,
.auth-divider::after {
    content: "";
    height: 1px;
    flex: 1;
    background: var(--color-border);
}

.auth-tabs {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 0.9rem;
    background: rgba(28, 25, 22, 0.05);
    padding: 0.2rem;
    border-radius: 999px;
}

.auth-tabs button {
    flex: 1;
    border: 0;
    background: transparent;
    border-radius: 999px;
    padding: 0.45rem 0.6rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--color-dark-gray);
}

.auth-tabs button.is-active {
    background: var(--color-white);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.auth-form label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.7rem;
}

.auth-form input[type="email"],
.auth-form input[type="password"],
.auth-form input[type="text"] {
    height: 2.55rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    padding: 0 0.8rem;
    font-size: 0.95rem;
    background: var(--color-white);
    color: var(--color-text);
}

.auth-check {
    flex-direction: row !important;
    align-items: flex-start;
    font-weight: 500 !important;
    gap: 0.55rem !important;
}

.auth-submit {
    width: 100%;
    height: 2.7rem;
    border: 0;
    border-radius: 12px;
    background: var(--color-inverse-bg);
    color: var(--color-inverse-text);
    font-weight: 700;
    cursor: pointer;
}

.auth-form-error {
    color: #b91c1c;
    font-size: 0.86rem;
    margin: 0 0 0.7rem;
}

.account-hero {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.account-hero-copy {
    min-width: 0;
    flex: 1;
}

.account-hero-copy h1 {
    margin: 0.1rem 0 0.15rem;
    font-size: clamp(1.35rem, 5vw, 2rem);
    overflow-wrap: anywhere;
}

.account-progress {
    margin-top: 0.65rem;
    height: 0.55rem;
    border-radius: 999px;
    background: rgba(28, 25, 22, 0.08);
    overflow: hidden;
}

.account-progress-fill {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--color-accent);
}

.account-progress-label {
    margin: 0.35rem 0 0;
    font-size: 0.78rem;
    color: var(--color-dark-gray);
}

.account-rating {
    margin: 0 0 0.5rem;
    font-size: clamp(2rem, 8vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.account-avatar {
    width: 4.2rem;
    height: 4.2rem;
    border-radius: 999px;
    overflow: hidden;
    background: var(--color-accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 700;
    flex-shrink: 0;
}

.account-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.account-meta {
    color: var(--color-dark-gray);
    margin: 0.2rem 0 0;
}

.account-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.account-stat {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 0.85rem 0.5rem;
    text-align: center;
}

.account-stat strong {
    display: block;
    font-size: 1.25rem;
}

.account-stat span {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-dark-gray);
}

.account-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

.account-card h2 {
    margin: 0 0 0.8rem;
    font-size: 1.05rem;
}

.account-note {
    color: var(--color-dark-gray);
    font-size: 0.88rem;
}

.badge-list,
.recent-solves {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.badge-list li,
.recent-solves li {
    display: flex;
    gap: 0.7rem;
    align-items: flex-start;
}

.recent-solves li {
    justify-content: space-between;
    flex-wrap: wrap;
}

.recent-solves a {
    overflow-wrap: anywhere;
}

.badge-icon {
    font-size: 1.2rem;
}

.badge-list em {
    display: block;
    font-style: normal;
    color: var(--color-dark-gray);
    font-size: 0.82rem;
}

.leaderboard-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 1rem 0;
}

.leaderboard-tabs a {
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    text-decoration: none;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.86rem;
    font-weight: 600;
}

.leaderboard-tabs a.is-active {
    background: var(--color-inverse-bg);
    color: var(--color-inverse-text);
    border-color: var(--color-inverse-bg);
}

.leaderboard-list {
    list-style: none;
    margin: 0;
    padding: 0;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.leaderboard-list li {
    display: grid;
    grid-template-columns: 2.4rem 1fr repeat(4, auto);
    gap: 0.7rem;
    align-items: center;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.leaderboard-list li:last-child {
    border-bottom: 0;
}

.leaderboard-list li.is-me {
    background: rgba(181, 136, 99, 0.12);
}

.lb-rank {
    font-weight: 700;
    color: var(--color-accent-dark);
}

.lb-stat {
    font-size: 0.8rem;
    color: var(--color-dark-gray);
}

.puzzle-xp-row {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.puzzle-xp-row span {
    flex: 1;
    text-align: center;
    background: rgba(181, 136, 99, 0.1);
    border-radius: 10px;
    padding: 0.45rem 0.2rem;
    font-size: 0.72rem;
    font-weight: 600;
}

.puzzle-toast {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 80;
    background: var(--color-inverse-bg);
    color: var(--color-inverse-text);
    padding: 0.7rem 0.9rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    font-size: 0.88rem;
    max-width: 260px;
}

@media (max-width: 800px) {
    .account-hero {
        align-items: flex-start;
    }
    .account-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .account-grid {
        grid-template-columns: 1fr;
    }
    .leaderboard-list li {
        display: flex;
        flex-wrap: wrap;
        gap: 0.35rem 0.7rem;
        align-items: baseline;
    }
    .lb-rank {
        min-width: 1.5rem;
    }
    .lb-name {
        flex: 1 1 8rem;
        min-width: 0;
        overflow-wrap: anywhere;
    }
    .header-signin {
        padding: 0 0.65rem;
        font-size: 0.78rem;
    }
}

@media (min-width: 901px) {
    .account-stats {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }
}

[data-theme="dark"] .account-progress {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .account-rating {
    color: #eef3f8;
}

[data-theme="dark"] .account-progress-label {
    color: #9aa8b6;
}

[data-theme="dark"] .auth-card,
[data-theme="dark"] .account-card,
[data-theme="dark"] .account-stat,
[data-theme="dark"] .leaderboard-list {
    background: #161e27;
    color: #eef3f8;
}

[data-theme="dark"] .account-page h1,
[data-theme="dark"] .auth-card h1,
[data-theme="dark"] .account-card h2,
[data-theme="dark"] .account-stat strong,
[data-theme="dark"] .lb-name {
    color: #eef3f8;
}

[data-theme="dark"] .auth-lead,
[data-theme="dark"] .account-meta,
[data-theme="dark"] .account-note,
[data-theme="dark"] .lb-stat,
[data-theme="dark"] .badge-list em {
    color: #9aa8b6;
}

[data-theme="dark"] .account-note a,
[data-theme="dark"] .auth-check a {
    color: #e2bc90;
}

[data-theme="dark"] .leaderboard-tabs a {
    background: #161e27;
    color: #eef3f8;
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .leaderboard-tabs a.is-active {
    background: #f8fafc;
    color: #0f172a;
    border-color: #f8fafc;
}

[data-theme="dark"] .auth-social-btn {
    background: #243040;
    color: #eef3f8;
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .auth-social-btn.google {
    background: #fff;
    color: #1f2937;
    border-color: #dadce0;
}

[data-theme="dark"] .auth-social-btn.apple {
    background: #0b0d10;
    color: #fff;
    border-color: #0b0d10;
}

[data-theme="dark"] .auth-social-btn.facebook {
    background: #1877f2;
    color: #fff;
    border-color: #1877f2;
}

[data-theme="dark"] .auth-tabs {
    background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .auth-tabs button {
    color: #9aa8b6;
}

[data-theme="dark"] .auth-tabs button.is-active {
    background: #243040;
    color: #eef3f8;
}

[data-theme="dark"] .auth-form label {
    color: #d5dde6;
}

[data-theme="dark"] .auth-form input[type="email"],
[data-theme="dark"] .auth-form input[type="password"],
[data-theme="dark"] .auth-form input[type="text"] {
    background: #0e141b;
    color: #eef3f8;
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .auth-submit {
    background: #f8fafc;
    color: #0f172a;
}

[data-theme="dark"] .header-account-menu {
    background: #161e27;
    color: #eef3f8;
    border-color: rgba(148, 163, 184, 0.28);
}

[data-theme="dark"] .header-account-menu a,
[data-theme="dark"] .header-account-meta strong {
    color: #eef3f8;
}

[data-theme="dark"] .header-account-menu a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

[data-theme="dark"] .header-tools-menu {
    background: #161e27;
    color: #eef3f8;
}

[data-theme="dark"] .header-tools-menu .tools-dark-label,
[data-theme="dark"] .header-tools-menu label {
    color: #eef3f8;
}

[data-theme="dark"] .header-tools-menu select {
    background: #0e141b;
    color: #eef3f8;
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .contact-modal {
    background: #161e27;
    color: #eef3f8;
}

[data-theme="dark"] .contact-modal-head h3,
[data-theme="dark"] .contact-modal-close {
    color: #eef3f8;
}

[data-theme="dark"] .contact-copy {
    color: #9aa8b6;
}