/* ============================================================
   CodingClap — landing.css
   Public landing / demo page. Uses the light, neutral tokens
   defined in style.css (--bg, --surface, --accent, --text, …).
   No dark navy, no neon — the landing page matches the app.
   ============================================================ */

/* ---- Shared section scaffolding ---- */
.lp-section {
    padding: 5.5rem 0;
    position: relative;
}
.lp-section--inset {
    background: var(--surface-inset);
}
.lp-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.9rem;
    display: inline-block;
}
.lp-title {
    font-family: var(--font-sans);
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 1rem;
}
.lp-subtitle {
    font-size: 1.08rem;
    color: var(--text-secondary);
    line-height: 1.65;
    max-width: 560px;
}
.lp-accent {
    color: var(--accent);
}

.lp-btn-ghost {
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.8rem 1.4rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-strong);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.15s ease, color 0.15s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.lp-btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ---- HERO ---- */
.lp-hero {
    padding: 4.5rem 0 5.5rem;
    background: radial-gradient(
            1000px 400px at 80% -10%,
            var(--accent-soft),
            transparent 60%
        ),
        var(--bg);
}
.lp-hero__grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
    align-items: center;
}
.lp-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.9rem;
    border-radius: 100px;
    background: var(--accent-soft);
    border: 1px solid var(--info-border);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.03em;
    margin-bottom: 1.3rem;
}
.lp-badge__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: lp-pulse 2s ease-in-out infinite;
}
@keyframes lp-pulse {
    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.4);
    }
}

.lp-hero__title {
    font-family: var(--font-sans);
    font-size: 3.1rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1.2rem;
}
.lp-hero__desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: 460px;
}
.lp-hero__actions {
    display: flex;
    gap: 0.9rem;
    align-items: center;
    flex-wrap: wrap;
}
.lp-hero__stats {
    display: flex;
    gap: 2.2rem;
    margin-top: 2.6rem;
    padding-top: 1.8rem;
    border-top: 1px solid var(--border);
}
.lp-stat__value {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
}
.lp-stat__label {
    font-size: 0.74rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* ---- Hero mock card ---- */
.lp-hero__visual {
    position: relative;
}
.lp-mock {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.6rem;
    box-shadow: var(--shadow-md);
}
.lp-mock__header {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 1.1rem;
}
.lp-mock__header--tight {
    margin-bottom: 0.6rem;
}
.lp-mock__avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #fff;
    flex-shrink: 0;
}
.lp-mock__avatar.lp-avatar-sm {
    width: 28px;
    height: 28px;
    font-size: 0.7rem;
}
.lp-avatar-blue {
    background: linear-gradient(135deg, #3f6cb0, #06b6d4);
}
.lp-avatar-orange {
    background: linear-gradient(135deg, #f97316, #facc15);
}
.lp-mock__name {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text);
}
.lp-mock__name--sm {
    font-size: 0.8rem;
}
.lp-mock__info {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}
.lp-mock__tag {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    background: var(--warning-bg);
    color: var(--warning);
    font-weight: 600;
}
.lp-mock__question {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.9rem;
    line-height: 1.5;
}
.lp-mock__code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background: #f7f9fb;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
    margin-bottom: 1.1rem;
    line-height: 1.7;
    color: var(--text);
    white-space: pre;
    overflow-x: auto;
}
.c-kw {
    color: #3f6cb0;
    font-weight: 600;
}
.c-str {
    color: #2f7d57;
}
.c-fn {
    color: #9a6b1e;
}
.c-cm {
    color: var(--text-muted);
    font-style: italic;
}
.lp-mock__actions {
    display: flex;
    gap: 0.8rem;
    align-items: center;
}
.lp-mock__clap {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    background: var(--surface-inset);
    border: 1px solid var(--border);
}
.lp-mock__answers {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--success);
    margin-left: auto;
    font-weight: 600;
}
.lp-mock-answer {
    background: var(--surface);
    border: 1px solid var(--success-border);
    border-radius: var(--radius-md);
    padding: 1.1rem 1.3rem;
    margin: -0.4rem 0 0 2rem;
    position: relative;
    box-shadow: var(--shadow-sm);
}
.lp-mock-answer__badge {
    position: absolute;
    top: -8px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    background: var(--success-bg);
    color: var(--success);
    font-weight: 600;
    border: 1px solid var(--success-border);
}
.lp-mock-answer__text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
.lp-mock-answer__teacher {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    background: var(--warning-bg);
    color: var(--warning);
    font-weight: 600;
}

/* ---- PROBLEM ---- */
.lp-problem__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2.6rem;
}
.lp-problem__list {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}
.lp-problem__item {
    display: flex;
    align-items: flex-start;
    gap: 0.9rem;
    padding: 1.1rem 1.3rem;
    border-radius: var(--radius-md);
    background: var(--error-bg);
    border: 1px solid var(--error-border);
}
.lp-problem__icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
    border: 1px solid var(--error-border);
}
.lp-problem__text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}
.lp-problem__text strong {
    color: var(--text);
    font-weight: 700;
}
.lp-problem__visual {
    text-align: center;
}
.lp-problem__clock {
    font-family: var(--font-sans);
    font-size: 6rem;
    font-weight: 800;
    color: var(--error);
    opacity: 0.18;
    line-height: 1;
}
.lp-problem__time {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--error);
    opacity: 0.7;
    margin-top: 0.4rem;
}

/* ---- HOW IT WORKS ---- */
.lp-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.3rem;
    margin-top: 3rem;
}
.lp-step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.8rem 1.4rem;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease,
        border-color 0.2s ease;
}
.lp-step:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}
.lp-step__num {
    font-family: var(--font-sans);
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--text);
    opacity: 0.07;
    position: absolute;
    top: 0.4rem;
    right: 1rem;
    line-height: 1;
}
.lp-step__icon {
    font-size: 1.7rem;
    margin-bottom: 0.9rem;
}
.lp-step__title {
    font-family: var(--font-sans);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
}
.lp-step__desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---- FEATURES ---- */
.lp-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.3rem;
    margin-top: 3rem;
}
.lp-feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.8rem 1.6rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.lp-feature:hover {
    transform: translateY(-2px);
    border-color: var(--border-strong);
}
.lp-feature--highlight {
    border-color: var(--warning-border);
    background: var(--warning-bg);
}
.lp-feature__icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.1rem;
    background: var(--accent-soft);
}
.lp-feature--highlight .lp-feature__icon {
    background: #fff;
}
.lp-feature__title {
    font-family: var(--font-sans);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
}
.lp-feature__desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---- TIME GATE ---- */
.lp-timegate {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2.6rem;
}
.lp-schedule {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.lp-time-row {
    display: flex;
    align-items: center;
    gap: 1.1rem;
    padding: 1rem 1.3rem;
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--border);
}
.lp-time-row--weekend {
    border-color: var(--warning-border);
}
.lp-time-day {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
    width: 90px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.lp-time-row--weekend .lp-time-day {
    color: var(--warning);
}
.lp-time-bar-wrap {
    flex: 1;
    height: 8px;
    border-radius: 4px;
    background: var(--surface-inset);
    overflow: hidden;
}
.lp-time-bar {
    height: 100%;
    border-radius: 4px;
    background: var(--accent);
}
.lp-time-row--weekend .lp-time-bar {
    background: var(--warning);
}
.lp-time-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}
.lp-timegate__msg {
    padding: 1.9rem;
    border-radius: var(--radius-lg);
    background: var(--accent-soft);
    border: 1px solid var(--info-border);
}
.lp-timegate__msg h3 {
    font-family: var(--font-sans);
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 0.9rem;
}
.lp-timegate__msg p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.7rem;
}
.lp-timegate__msg p:last-child {
    margin-bottom: 0;
}

/* ---- TRUST ---- */
.lp-trust {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.3rem;
    margin-top: 3rem;
}
.lp-trust__card {
    display: flex;
    align-items: flex-start;
    gap: 1.1rem;
    padding: 1.6rem;
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--border);
}
.lp-trust__icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.lp-trust__title {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 0.3rem;
}
.lp-trust__desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---- TEACHER DASHBOARD PREVIEW ---- */
.lp-dash {
    margin-top: 3rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.lp-dash__header {
    padding: 0.9rem 1.4rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface-inset);
}
.lp-dash__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.lp-dash__dot--r {
    background: #e0796f;
}
.lp-dash__dot--y {
    background: #e0b45f;
}
.lp-dash__dot--g {
    background: #6fbf95;
}
.lp-dash__title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}
.lp-dash__body {
    padding: 1.4rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.4rem;
}
.lp-dash__feed {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.lp-dash__item {
    padding: 0.7rem 1rem;
    border-radius: 8px;
    background: var(--surface-inset);
    border: 1px solid var(--border);
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
}
.lp-dash__name {
    color: var(--accent);
    font-weight: 700;
}
.lp-dash__school {
    color: var(--warning);
    font-weight: 600;
}
.lp-dash__topic {
    color: var(--info);
    font-weight: 600;
}
.lp-dash__stats {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.lp-dash__stat {
    padding: 0.8rem 1rem;
    border-radius: 8px;
    background: var(--surface-inset);
    border: 1px solid var(--border);
}
.lp-dash__val {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 800;
}
.lp-val-blue {
    color: var(--accent);
}
.lp-val-green {
    color: var(--success);
}
.lp-val-orange {
    color: var(--warning);
}
.lp-dash__label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ---- CTA ---- */
.lp-cta {
    background: var(--bg);
}
.lp-cta__box {
    max-width: 620px;
    margin: 0 auto;
    text-align: center;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-lg);
    background: var(--accent-soft);
    border: 1px solid var(--info-border);
}
.lp-cta__title {
    font-size: 2rem;
}
.lp-cta__subtitle {
    margin: 0.4rem auto 0;
    text-align: center;
}
.lp-cta__actions {
    display: flex;
    gap: 0.9rem;
    justify-content: center;
    margin-top: 1.6rem;
    flex-wrap: wrap;
}
.lp-cta__note {
    margin-top: 1.4rem;
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* The landing page centers its CTA label; keep it inline-centered. */
.lp-cta .lp-label {
    display: block;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
    .lp-hero__grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .lp-hero__title {
        font-size: 2.4rem;
    }
    .lp-title {
        font-size: 1.9rem;
    }
    .lp-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .lp-features {
        grid-template-columns: 1fr 1fr;
    }
    .lp-problem__grid,
    .lp-timegate,
    .lp-trust {
        grid-template-columns: 1fr;
    }
    .lp-dash__body {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 600px) {
    .lp-section {
        padding: 3.5rem 0;
    }
    .lp-hero__title {
        font-size: 2rem;
    }
    .lp-title {
        font-size: 1.6rem;
    }
    .lp-steps,
    .lp-features {
        grid-template-columns: 1fr;
    }
    .lp-hero__stats {
        flex-direction: column;
        gap: 1rem;
    }
    .lp-hero__actions,
    .lp-cta__actions {
        flex-direction: column;
        align-items: stretch;
    }
    .lp-mock-answer {
        margin-left: 1rem;
    }
}