@import url('https://fonts.googleapis.com/css2?family=Rubik:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* Design tokens now live in global.css (single source of truth) */

/* --- Keyframes --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes floatBadge {
    from { transform: translateY(0); }
    to { transform: translateY(-8px); }
}

/* --- Hero Section --- */
.hero {
    position: relative;
    box-sizing: border-box;
    padding: 96px 20px 110px;
    background-color: var(--mm-bg);
    font-family: var(--mm-font);
    animation: fadeInUp 0.7s ease-out;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--mm-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--mm-border) 1px, transparent 1px);
    background-size: 64px 64px;
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 75%);
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 75%);
    opacity: 0.5;
    pointer-events: none;
}

.hero::after {
    content: "";
    position: absolute;
    top: -120px;
    inset-inline-start: -120px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.16), transparent 70%);
    filter: blur(10px);
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1160px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 56px;
    text-align: start;
}

.hero-title {
    margin: 0 0 14px;
    color: var(--mm-text);
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.hero-title .text-accent {
    color: var(--mm-accent);
}

.hero-text {
    color: var(--mm-text-dim);
    font-size: 1.15rem;
    line-height: 1.6;
    max-width: 480px;
    margin: 0 0 22px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 26px;
}

/* .btn/.btn-primary/.btn-secondary/.btn-arrow now live in global.css */

.hero-stats {
    display: flex;
    align-items: center;
    gap: 22px;
    margin: 0;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-num {
    margin: 0;
    color: var(--mm-text);
    font-family: var(--mm-mono);
    font-size: 1.4rem;
    font-weight: 600;
}

.stat-label {
    margin: 0;
    color: var(--mm-text-dim);
    font-size: 0.82rem;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--mm-border);
}

/* --- Hero code panel --- */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.code-window {
    width: 100%;
    max-width: 400px;
    background: #0b1220;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
    overflow: hidden;
    transform: rotate(-1deg);
}

.code-window-bar {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 12px 14px;
    background: #111827;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.wdot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.wdot-r { background: #f87171; }
.wdot-y { background: #fbbf24; }
.wdot-g { background: #34d399; }

.code-window-title {
    margin-inline-start: 8px;
    color: #64748b;
    font-family: var(--mm-mono);
    font-size: 0.78rem;
}

.code-window-body {
    margin: 0;
    padding: 20px 22px;
    color: #cbd5e1;
    font-family: var(--mm-mono);
    font-size: 0.88rem;
    line-height: 1.7;
    text-align: left;
    direction: ltr;
    overflow-x: auto;
}

.tok-kw { color: #c084fc; }
.tok-cls { color: #fbbf24; }
.tok-fn { color: #60a5fa; }
.tok-type { color: #34d399; }
.tok-str { color: #86efac; }

.float-badge {
    position: absolute;
    padding: 9px 16px;
    background: var(--mm-surface);
    border: 1px solid var(--mm-border);
    border-radius: 10px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
    color: var(--mm-text);
    font-family: var(--mm-font);
    font-size: 0.82rem;
    font-weight: 600;
    animation: floatBadge 3s ease-in-out infinite alternate;
}

.float-badge span {
    color: var(--mm-accent);
}

.float-badge-a {
    top: -14px;
    inset-inline-end: 8%;
}

.float-badge-b {
    bottom: -16px;
    inset-inline-start: 4%;
    animation-delay: 0.6s;
}

/* --- Daily Question Section --- */
.daily-section {
    background-color: var(--mm-bg);
    padding: 0 20px 100px;
    font-family: var(--mm-font);
}

.daily-card {
    --card-accent: var(--mm-accent);
    --card-accent-soft: rgba(96, 165, 250, 0.12);
    max-width: 700px;
    margin: 0 auto;
    background: linear-gradient(165deg, var(--mm-surface) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--mm-border);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
}

.daily-card.daily-java {
    --card-accent: #ed8b00;
    --card-accent-soft: rgba(237, 139, 0, 0.14);
}

.daily-card.daily-csharp {
    --card-accent: #9b4f96;
    --card-accent-soft: rgba(155, 79, 150, 0.14);
}

.daily-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.daily-card-top-start {
    display: flex;
    align-items: center;
    gap: 8px;
}

.daily-lang-badge {
    padding: 5px 14px;
    border-radius: 999px;
    background: var(--card-accent-soft);
    border: 1px solid var(--card-accent-soft);
    color: var(--card-accent);
    font-family: var(--mm-mono);
    font-size: 0.8rem;
    font-weight: 700;
}

.daily-streak-badge {
    position: relative;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(251, 191, 36, 0.12);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fbbf24;
    font-family: var(--mm-mono);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.daily-streak-badge.streak-pop {
    animation: streak-pop 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.daily-streak-badge.streak-pop::after {
    content: "";
    position: absolute;
    inset: -5px;
    border-radius: 999px;
    border: 2px solid #fbbf24;
    animation: streak-ring 0.6s ease-out forwards;
    pointer-events: none;
}

.daily-streak-badge .streak-flame {
    display: inline-block;
}

.daily-streak-badge.streak-pop .streak-flame {
    animation: streak-flame-bounce 0.6s ease;
}

.daily-streak-badge.streak-pop .streak-count {
    display: inline-block;
    animation: streak-count-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.streak-tier {
    cursor: help;
}

.streak-particle {
    position: absolute;
    left: 50%;
    top: 50%;
    pointer-events: none;
    font-size: 0.8rem;
    animation: streak-particle-fly 0.9s ease-out forwards;
}

@keyframes streak-pop {
    0% { transform: scale(1); }
    35% { transform: scale(1.3) rotate(-4deg); }
    60% { transform: scale(0.97) rotate(3deg); }
    100% { transform: scale(1) rotate(0); }
}

@keyframes streak-ring {
    0% { transform: scale(0.85); opacity: 0.9; }
    100% { transform: scale(1.7); opacity: 0; }
}

@keyframes streak-flame-bounce {
    0%, 100% { transform: translateY(0) scale(1) rotate(0); }
    30% { transform: translateY(-4px) scale(1.35) rotate(-12deg); }
    60% { transform: translateY(1px) scale(1.1) rotate(8deg); }
}

@keyframes streak-count-pop {
    0% { transform: scale(1); }
    40% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

@keyframes streak-particle-fly {
    0% { transform: translate(-50%, -50%) translate(0, 0) scale(0.6) rotate(0deg); opacity: 1; }
    100% { transform: translate(-50%, -50%) translate(var(--tx), var(--ty)) scale(1) rotate(var(--rot)); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .daily-streak-badge.streak-pop,
    .daily-streak-badge.streak-pop::after,
    .daily-streak-badge.streak-pop .streak-flame,
    .daily-streak-badge.streak-pop .streak-count,
    .streak-particle {
        animation: none !important;
    }
}

.daily-card-top-end {
    display: flex;
    align-items: center;
    gap: 10px;
}

.daily-date {
    color: var(--mm-text-dim);
    font-family: var(--mm-mono);
    font-size: 0.82rem;
}

.daily-archive-badge {
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(96, 165, 250, 0.12);
    border: 1px solid rgba(96, 165, 250, 0.3);
    color: var(--mm-accent);
    font-size: 0.72rem;
    font-weight: 700;
}

.daily-history-wrap {
    position: relative;
}

.daily-history-toggle {
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid var(--mm-border);
    background: transparent;
    color: var(--mm-text-dim);
    font-family: var(--mm-font);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.daily-history-toggle:hover,
.daily-history-toggle[aria-expanded="true"] {
    border-color: var(--mm-accent);
    color: var(--mm-accent);
}

.daily-history-panel {
    position: absolute;
    top: calc(100% + 8px);
    inset-inline-end: 0;
    z-index: 5;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    width: 260px;
    padding: 12px;
    background: var(--mm-surface);
    border: 1px solid var(--mm-border);
    border-radius: 14px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
}

.daily-history-item {
    padding: 8px 4px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: rgba(255, 255, 255, 0.03);
    color: var(--mm-text);
    font-family: var(--mm-mono);
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.daily-history-item:hover {
    border-color: var(--mm-accent);
}

.daily-history-item.active {
    background: var(--mm-accent-strong);
    border-color: var(--mm-accent-strong);
    color: #ffffff;
}

body.light-mode .daily-history-item {
    background: rgba(0, 0, 0, 0.03);
}

@media (max-width: 480px) {
    .daily-history-panel {
        inset-inline-end: unset;
        inset-inline-start: 0;
        width: 220px;
        grid-template-columns: repeat(3, 1fr);
    }
}

.daily-leaderboard-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 16px;
    padding: 14px 20px;
    background: rgba(251, 191, 36, 0.08);
    border: 1px solid rgba(251, 191, 36, 0.28);
    border-radius: 14px;
    color: #fbbf24;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    text-align: center;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.daily-leaderboard-cta:hover {
    transform: translateY(-2px);
    border-color: #fbbf24;
    background: rgba(251, 191, 36, 0.14);
}

.daily-leaderboard-cta-arrow {
    transition: transform 0.2s ease;
}

.daily-leaderboard-cta:hover .daily-leaderboard-cta-arrow {
    transform: translateX(-4px);
}

.daily-streak-guest-cta {
    margin: -6px 0 16px;
    color: var(--mm-text-dim);
    font-size: 0.88rem;
}

.daily-streak-guest-cta a {
    color: var(--mm-accent);
    font-weight: 600;
    text-decoration: none;
}

.daily-streak-guest-cta a:hover {
    text-decoration: underline;
}

.daily-question-text {
    margin: 0 0 18px;
    color: var(--mm-text);
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.6;
    unicode-bidi: plaintext;
}

.daily-code {
    direction: ltr !important;
    text-align: left !important;
    margin: 0 0 18px !important;
    padding: 16px 18px !important;
    background-color: #0b1220 !important;
    border-radius: 12px !important;
    border: none !important;
    box-shadow: none !important;
    overflow-x: auto;
}

.daily-code code {
    display: block;
    color: #cbd5e1;
    font-family: var(--mm-mono);
    font-size: 0.92rem;
    line-height: 1.6;
    white-space: pre;
    text-shadow: none !important;
}

.daily-options {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.daily-option {
    box-sizing: border-box;
    padding: 16px 14px;
    border: 1px solid var(--mm-border);
    border-radius: 12px;
    background: var(--mm-bg);
    color: var(--mm-text);
    font-family: var(--mm-font);
    font-size: 0.98rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.daily-option:hover:not(:disabled) {
    border-color: var(--card-accent);
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
    transform: translateY(-2px);
}

.daily-option:disabled {
    cursor: default;
}

.daily-option.correct-answer {
    border-color: #4ade80;
    background: rgba(74, 222, 128, 0.1);
}

.daily-option.wrong-answer {
    border-color: #f87171;
    background: rgba(248, 113, 113, 0.1);
}

body.light-mode .daily-option.correct-answer {
    background: rgba(34, 197, 94, 0.1);
    border-color: #16a34a;
}

body.light-mode .daily-option.wrong-answer {
    background: rgba(239, 68, 68, 0.1);
    border-color: #dc2626;
}

.daily-wrong-message {
    margin-top: 18px;
    padding: 14px 18px;
    border-radius: 12px;
    text-align: center;
    background: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.daily-wrong-message p {
    margin: 0;
    color: var(--mm-text);
    font-weight: 600;
}

.daily-action-buttons {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.daily-action-btn {
    flex: 1;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid var(--mm-border);
    background: transparent;
    color: var(--mm-text);
    font-family: var(--mm-font);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.daily-action-btn:hover {
    border-color: var(--mm-text-dim);
    transform: translateY(-1px);
}

.daily-action-btn.primary {
    background: var(--mm-accent-strong);
    border-color: var(--mm-accent-strong);
    color: #ffffff;
}

.daily-action-btn.primary:hover {
    background: var(--mm-accent-deep);
    border-color: var(--mm-accent-deep);
}

.daily-feedback {
    margin-top: 18px;
    padding: 18px;
    border-radius: 12px;
    text-align: center;
}

.daily-feedback.correct {
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.daily-feedback.wrong {
    background: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.daily-feedback.revealed {
    background: rgba(96, 165, 250, 0.08);
    border: 1px solid rgba(96, 165, 250, 0.3);
}

.daily-feedback-title {
    margin: 0 0 8px;
    color: var(--mm-text);
    font-size: 1.05rem;
    font-weight: 700;
}

.daily-feedback-text {
    margin: 0;
    color: var(--mm-text-dim);
    line-height: 1.6;
    unicode-bidi: plaintext;
}

.daily-empty {
    margin: 0;
    color: var(--mm-text-dim);
    text-align: center;
}

@media (max-width: 600px) {
    .daily-options {
        grid-template-columns: 1fr;
    }

    .daily-action-buttons {
        flex-direction: column;
    }

    .daily-card {
        padding: 22px;
    }
}

/* --- Tracks Section --- */
.tracks-section {
    background-color: var(--mm-bg);
    padding: 100px 20px;
    font-family: var(--mm-font);
}

.section-head {
    max-width: 1160px;
    margin: 0 auto 48px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.section-eyebrow {
    color: var(--mm-accent);
    font-family: var(--mm-mono);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.04em;
}

.section-title {
    margin: 0;
    color: var(--mm-text);
    font-size: 2rem;
    font-weight: 800;
}

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    max-width: 1160px;
    margin: 0 auto;
}

.track-card {
    --card-accent: var(--mm-accent);
    --card-accent-soft: rgba(96, 165, 250, 0.12);
    position: relative;
    display: flex;
    flex-direction: column;
    background: linear-gradient(165deg, var(--mm-surface) 0%, rgba(255, 255, 255, 0.02) 100%);
    border: 1px solid var(--mm-border);
    padding: 32px;
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
}

.track-card::before {
    content: "";
    position: absolute;
    top: 0;
    inset-inline: 0;
    height: 4px;
    border-radius: 16px 16px 0 0;
    background: linear-gradient(90deg, var(--card-accent), var(--card-accent-soft));
}

.track-card:hover {
    transform: translateY(-6px);
    border-color: var(--card-accent);
    box-shadow: 0 22px 46px rgba(0, 0, 0, 0.22), 0 0 0 1px var(--card-accent-soft);
}

.track-card.track-java {
    --card-accent: #ed8b00;
    --card-accent-soft: rgba(237, 139, 0, 0.14);
}

.track-card.track-csharp {
    --card-accent: #9b4f96;
    --card-accent-soft: rgba(155, 79, 150, 0.14);
}

.track-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.track-index {
    color: var(--mm-text-dim);
    font-family: var(--mm-mono);
    font-size: 0.85rem;
    opacity: 0.6;
}

.track-icon {
    width: 52px;
    height: 52px;
    padding: 10px;
    box-sizing: border-box;
    background: var(--card-accent-soft, rgba(96, 165, 250, 0.08));
    border: 1px solid var(--card-accent-soft, var(--mm-border));
    border-radius: 12px;
    transition: transform 0.25s ease;
}

.track-card:hover .track-icon {
    transform: scale(1.06);
}

.icon-import {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.track-content h3 {
    margin: 0 0 8px;
    color: var(--mm-text);
    font-size: 1.4rem;
    font-weight: 700;
}

.track-content p {
    margin: 0 0 18px;
    color: var(--mm-text-dim);
    font-size: 0.95rem;
    line-height: 1.5;
}

.track-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 22px;
}

.track-meta span {
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(96, 165, 250, 0.08);
    border: 1px solid var(--mm-border);
    color: var(--mm-text-dim);
    font-size: 0.78rem;
}

.cta-text {
    margin-top: auto;
    color: var(--card-accent, var(--mm-accent));
    font-weight: 700;
    font-size: 0.9rem;
}

.track-card:hover .cta-text span {
    display: inline-block;
    transform: translateX(-4px);
    transition: transform 0.2s ease;
}

/* --- Features Section --- */
.features-section {
    padding: 90px 20px 110px;
    background: var(--mm-bg);
    font-family: var(--mm-font);
}

.features-grid {
    max-width: 1160px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--mm-border);
}

.feature-item {
    padding: 32px 28px;
    border-inline-end: 1px solid var(--mm-border);
    transition: background-color 0.3s ease;
}

.feature-item:last-child {
    border-inline-end: none;
}

.feature-item:hover {
    background: rgba(96, 165, 250, 0.04);
}

.feature-index {
    display: block;
    margin-bottom: 14px;
    color: var(--mm-accent);
    font-family: var(--mm-mono);
    font-size: 0.85rem;
    font-weight: 600;
}

.feature-item h4 {
    margin: 0 0 10px;
    color: var(--mm-text);
    font-size: 1.1rem;
    font-weight: 700;
}

.feature-item p {
    margin: 0;
    color: var(--mm-text-dim);
    font-size: 0.94rem;
    line-height: 1.6;
}

/* --- Responsiveness --- */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-visual {
        margin-top: 16px;
    }

    .code-window {
        transform: none;
    }

    .tracks-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
        border-top: none;
    }

    .feature-item {
        border-inline-end: none;
        border-top: 1px solid var(--mm-border);
    }
}

@media (max-width: 700px) {
    .hero {
        padding: 100px 20px 80px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-text {
        font-size: 1.02rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero, .btn, .float-badge {
        animation: none !important;
        transition: none !important;
    }

    .btn:hover, .track-card:hover {
        transform: none;
    }
}

/* --- Light Mode Adjustments --- */
body.light-mode .hero::before {
    opacity: 0.7;
}

body.light-mode .hero::after {
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1), transparent 70%);
}

body.light-mode .track-card {
    border-color: rgba(15, 23, 42, 0.1);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.1);
}

body.light-mode .float-badge,
body.light-mode .code-window {
    box-shadow: 0 16px 34px rgba(15, 23, 42, 0.12);
}