/* ==========================================================================
   Future Academy — Download App Page Stylesheet
   Reuses and extends the core design tokens from home.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Download Hero Section
   -------------------------------------------------------------------------- */
.download-hero {
    padding-top: 8.5rem;
    padding-bottom: 4.5rem;
    background: radial-gradient(circle at 50% 0%, var(--primary-glow) 0%, transparent 65%);
    position: relative;
    overflow: hidden;
}

.download-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background-image: radial-gradient(var(--hero-grid-color) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
}

.download-hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-android-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    border: 1px solid rgba(37, 99, 235, 0.22);
}

[data-theme="dark"] .hero-android-badge {
    background-color: rgba(59, 130, 246, 0.16);
    border-color: rgba(59, 130, 246, 0.3);
}

.hero-android-badge i {
    color: #3DDC84; /* Official Android Green Accent */
    font-size: 1rem;
}

.download-hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-main);
    margin-bottom: 1.2rem;
    letter-spacing: -0.025em;
}

.download-hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 2rem;
    max-width: 580px;
}

.download-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.75rem;
}

.btn-download-android {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
    font-size: 1.05rem;
    font-weight: 700;
    padding: 0.95rem 2rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 18px rgba(16, 185, 129, 0.32);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all var(--transition-fast);
}

.btn-download-android:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
    color: #ffffff;
}

.btn-download-android:active {
    transform: translateY(0);
}

.btn-download-android i {
    font-size: 1.35rem;
}

.hero-meta-pills {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1.25rem;
    font-size: 0.875rem;
    color: var(--text-subtle);
}

.meta-pill-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.meta-pill-item i {
    color: var(--primary);
    font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   2. App Preview & Mockup Placeholder
   -------------------------------------------------------------------------- */
.download-preview-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-phone-frame {
    width: 100%;
    max-width: 330px;
    height: 520px;
    background: var(--bg-surface);
    border: 8px solid var(--text-main);
    border-radius: 40px;
    box-shadow: var(--shadow-xl), 0 0 0 1px var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal);
}

[data-theme="dark"] .mockup-phone-frame {
    border-color: #1e293b;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.mockup-phone-frame:hover {
    transform: translateY(-4px);
}

.mockup-camera-notch {
    width: 110px;
    height: 18px;
    background-color: var(--text-main);
    border-bottom-left-radius: 12px;
    border-bottom-right-radius: 12px;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

[data-theme="dark"] .mockup-camera-notch {
    background-color: #1e293b;
}

.mockup-screen-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-subtle) 100%);
    padding: 2.2rem 1.25rem 1.25rem 1.25rem;
    position: relative;
    overflow: hidden;
}

.placeholder-app-ui {
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: space-between;
    text-align: center;
}

.placeholder-app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 1rem;
}

.mini-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-main);
}

.mini-brand i {
    color: var(--primary);
}

.mini-status-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-full);
    background-color: rgba(16, 185, 129, 0.12);
    color: var(--success);
    font-weight: 600;
}

.placeholder-main-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1.5rem 0.5rem;
    background: var(--bg-card);
    border: 1.5px dashed var(--border-color);
    border-radius: var(--radius-lg);
    margin: auto 0;
}

.placeholder-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-glow) 0%, rgba(124, 58, 237, 0.12) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.75rem;
    margin-bottom: 0.85rem;
}

.placeholder-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.placeholder-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
    max-width: 220px;
}

.placeholder-chip-row {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    margin-top: 0.75rem;
}

.placeholder-chip {
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    background-color: var(--bg-subtle);
    color: var(--text-subtle);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.placeholder-app-footer {
    display: flex;
    justify-content: space-around;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-subtle);
    font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   3. Quick App Specifications Bar
   -------------------------------------------------------------------------- */
.specs-section {
    padding: 2.5rem 0;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background-color: var(--bg-subtle);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    transition: transform var(--transition-fast);
}

.spec-item:hover {
    transform: translateY(-2px);
    border-color: var(--border-color);
}

.spec-icon-box {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background-color: var(--primary-glow);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
}

.spec-label {
    font-size: 0.775rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    color: var(--text-subtle);
    margin-bottom: 0.15rem;
}

.spec-value {
    font-size: 0.975rem;
    font-weight: 700;
    color: var(--text-main);
}

/* --------------------------------------------------------------------------
   4. Verified App Features Grid
   -------------------------------------------------------------------------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon-box {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary-glow) 0%, rgba(124, 58, 237, 0.1) 100%);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1.25rem;
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.6rem;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   5. Step-by-Step Installation Instructions
   -------------------------------------------------------------------------- */
.install-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.step-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem 1.5rem;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.step-number-badge {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--primary-glow);
    color: var(--primary);
    font-weight: 800;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.step-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-subtle);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1.1rem;
}

.step-card h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.55;
}

.install-callout-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    max-width: 820px;
    margin: 0 auto;
}

.install-callout-box i {
    color: var(--primary);
    font-size: 1.25rem;
    margin-top: 0.2rem;
    flex-shrink: 0;
}

.install-callout-text {
    font-size: 0.925rem;
    color: var(--text-muted);
    line-height: 1.55;
}

.install-callout-text strong {
    color: var(--text-main);
}

/* --------------------------------------------------------------------------
   6. Trust, Safety & GitHub Release Note
   -------------------------------------------------------------------------- */
.trust-banner-card {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: var(--radius-xl);
    padding: 3rem 2.5rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2.5rem;
    align-items: center;
}

[data-theme="dark"] .trust-banner-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border-color: rgba(59, 130, 246, 0.25);
}

.trust-banner-content h3 {
    font-family: var(--font-heading);
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.trust-banner-content p {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

.trust-points-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.trust-point-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.925rem;
    color: var(--text-main);
    font-weight: 500;
}

.trust-point-item i {
    color: var(--success);
    font-size: 0.9rem;
}

.trust-banner-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

/* --------------------------------------------------------------------------
   7. Subtle Homepage App CTA Section
   -------------------------------------------------------------------------- */
.home-app-cta-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-subtle) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 3.5rem 3rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.home-app-cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    pointer-events: none;
}

.home-app-cta-content h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.3rem);
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.85rem;
    letter-spacing: -0.02em;
}

.home-app-cta-content p {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.75rem;
    max-width: 540px;
}

.home-app-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.home-app-cta-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.home-app-badge-box {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 2rem;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 260px;
    width: 100%;
}

.home-app-badge-box i.fa-android {
    font-size: 3.5rem;
    color: #3DDC84;
}

.home-app-badge-box .app-badge-name {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
}

.home-app-badge-box .app-badge-sub {
    font-size: 0.8rem;
    color: var(--text-subtle);
}

/* --------------------------------------------------------------------------
   8. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .download-hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .download-hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .download-hero-actions {
        justify-content: center;
    }

    .hero-meta-pills {
        justify-content: center;
    }

    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .install-steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .trust-banner-card {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .trust-points-list {
        align-items: center;
    }

    .home-app-cta-card {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2.5rem 2rem;
    }

    .home-app-cta-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .home-app-cta-actions {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .download-hero {
        padding-top: 7rem;
        padding-bottom: 3.5rem;
    }

    .specs-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .install-steps-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .mockup-phone-frame {
        max-width: 290px;
        height: 480px;
    }

    .btn-download-android {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .download-hero-title {
        font-size: 2rem;
    }

    .trust-banner-card {
        padding: 2rem 1.25rem;
    }

    .home-app-cta-card {
        padding: 2rem 1.25rem;
    }

    .feature-card {
        padding: 1.5rem 1.25rem;
    }

    .step-card {
        padding: 1.5rem 1.25rem;
    }
}