/* ============================================
   Download Page - Specific Styles
   Inherits variables from main.css
   ============================================ */

/* Download Hero */
.download-hero {
    padding-top: 200px;
    padding-bottom: 40px;
    text-align: center;
    position: relative;
}

.download-hero h1 {
    font-size: 4.8rem;
    line-height: 1.05;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #020617 0%, #334155 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-hero .hero-desc {
    font-size: 1.2rem;
    color: var(--text-sub);
    max-width: 700px;
    margin: 0 auto 16px;
    line-height: 1.8;
}

.download-hero .hero-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 0;
}

/* Platform Quick-Jump */
.platform-quick-jump {
    display: flex;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    padding: 56px 0 0;
}

.quick-jump-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 100px;
    background: rgba(255,255,255,0.6);
    border: 1px solid rgba(0,0,0,0.07);
    color: var(--text-sub);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(12px);
    font-family: var(--font-heading);
    letter-spacing: -0.01em;
}

.quick-jump-btn i {
    font-size: 1.15rem;
}

.quick-jump-btn:hover {
    background: rgba(255,255,255,0.95);
    color: var(--text-main);
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.07);
    border-color: rgba(0,0,0,0.1);
}

.quick-jump-btn.active {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 8px 24px -4px rgba(79, 70, 229, 0.45);
    transform: translateY(-2px) scale(1.04);
}

.quick-jump-btn.active i {
    filter: drop-shadow(0 0 6px rgba(255,255,255,0.5));
}

.quick-jump-btn.active:hover {
    box-shadow: 0 12px 30px -4px rgba(79, 70, 229, 0.55);
    transform: translateY(-3px) scale(1.05);
}

/* Platform Panels */
.platform-panel {
    display: none;
    padding: 52px 0 140px;
}

.platform-panel.active {
    display: block;
}

/* Panel Section Header */
.panel-header {
    margin-bottom: 60px;
}

.panel-header h2 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    letter-spacing: -0.04em;
}

.panel-header p {
    font-size: 1.1rem;
    color: var(--text-sub);
    max-width: 640px;
}

/* Client Grid */
.client-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

/* Client Card */
.client-card {
    background: var(--glass-bg);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 28px;
    overflow: hidden;
    transition: all 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    display: flex;
    flex-direction: column;
}

.client-card:hover {
    transform: translateY(-7px);
    background: rgba(255,255,255,0.8);
    border-color: #fff;
    box-shadow: 0 40px 80px -15px rgba(15,23,42,0.1);
}

/* Gradient top border for recommended cards */
.client-card.recommended::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 28px 28px 0 0;
}

.client-card-body {
    padding: 38px 38px 28px;
    flex: 1;
}

.client-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.client-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    background: #F1F5F9;
    border: 1px solid rgba(0,0,0,0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.55rem;
    color: var(--text-main);
    flex-shrink: 0;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.client-card:hover .client-icon {
    background: var(--text-main);
    color: #fff;
    transform: scale(1.06) rotate(-3deg);
}

.client-name-block {
    flex: 1;
    min-width: 0;
}

.client-name {
    font-size: 1.4rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: -0.03em;
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.client-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Status Badges */
.recommended-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 13px;
    border-radius: 100px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
    flex-shrink: 0;
}

.classic-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 13px;
    border-radius: 100px;
    background: rgba(0,0,0,0.05);
    color: var(--text-sub);
    font-size: 0.76rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}

.client-desc {
    font-size: 0.97rem;
    color: var(--text-sub);
    line-height: 1.75;
    margin-bottom: 20px;
}

/* Client Tags */
.client-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.client-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 11px;
    border-radius: 7px;
    background: rgba(0,0,0,0.04);
    font-size: 0.78rem;
    color: var(--text-sub);
    font-weight: 500;
    font-family: var(--font-mono);
}

.client-tag i {
    font-size: 0.7rem;
    color: var(--accent-primary);
}

/* Download Buttons Footer */
.client-card-footer {
    padding: 22px 38px;
    border-top: 1px solid rgba(0,0,0,0.045);
    background: rgba(0,0,0,0.015);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 11px;
    background: var(--text-main);
    color: #fff;
    font-size: 0.86rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.dl-btn:hover {
    background: #1E293B;
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(2,6,23,0.25);
    color: #fff;
}

.dl-btn.dl-btn-ghost {
    background: rgba(255,255,255,0.7);
    color: var(--text-main);
    border-color: rgba(0,0,0,0.07);
    backdrop-filter: blur(10px);
}

.dl-btn.dl-btn-ghost:hover {
    background: rgba(255,255,255,0.97);
    border-color: rgba(0,0,0,0.12);
    color: var(--text-main);
}

.dl-btn i {
    font-size: 0.88rem;
}

.dl-btn-label {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.dl-btn-arch {
    font-size: 0.86rem;
    font-weight: 700;
}

.dl-btn-size {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    opacity: 0.65;
}

/* GitHub Source Link */
.github-source-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 9px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid rgba(0,0,0,0.07);
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    margin-left: auto;
    white-space: nowrap;
    font-family: var(--font-mono);
    letter-spacing: 0.01em;
}

.github-source-link i {
    font-size: 0.92rem;
    transition: transform 0.25s ease;
}

.github-source-link:hover {
    background: rgba(0,0,0,0.05);
    color: var(--text-main);
    border-color: rgba(0,0,0,0.14);
    transform: translateY(-1px);
}

.github-source-link:hover i {
    transform: rotate(-8deg) scale(1.1);
}

.github-source-unavailable {
    cursor: default;
    opacity: 0.45;
    pointer-events: none;
    border-style: dashed;
}

/* iOS Section - App Store Notice */
.ios-notice-card {
    background: rgba(255,255,255,0.5);
    border: 1px solid rgba(255,255,255,0.85);
    border-radius: 24px;
    padding: 32px 36px;
    margin-bottom: 44px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.ios-notice-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: rgba(79, 70, 229, 0.08);
    border: 1px solid rgba(79, 70, 229, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.ios-notice-text h4 {
    font-size: 1.05rem;
    margin-bottom: 6px;
    color: var(--text-main);
}

.ios-notice-text p {
    color: var(--text-sub);
    font-size: 0.95rem;
    line-height: 1.65;
}

/* iOS App Grid */
.ios-app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* Core Downloads Section */
.core-group-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 44px 0 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

.core-group-title:first-of-type {
    margin-top: 0;
}

.core-group-title i {
    color: var(--accent-primary);
}

.core-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 8px;
}

.core-item {
    background: rgba(255,255,255,0.5);
    border: 1px solid rgba(255,255,255,0.85);
    border-radius: 14px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
}

.core-item:hover {
    background: rgba(255,255,255,0.92);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.07);
    border-color: rgba(255,255,255,0.95);
}

.core-item-info {
    flex: 1;
    min-width: 0;
}

.core-item-name {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-main);
    font-weight: 600;
    margin-bottom: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.core-item-size {
    font-size: 0.76rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.core-item-dl {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.88rem;
    flex-shrink: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.core-item:hover .core-item-dl {
    background: var(--accent-primary);
    transform: scale(1.08);
}

/* Core Usage Tip Box */
.core-tip-box {
    background: rgba(79, 70, 229, 0.04);
    border: 1px solid rgba(79, 70, 229, 0.12);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 44px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.core-tip-box i {
    color: var(--accent-primary);
    font-size: 1.1rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.core-tip-box p {
    font-size: 0.95rem;
    color: var(--text-sub);
    line-height: 1.65;
}

.core-tip-box p strong {
    color: var(--text-main);
}

.core-github-link {
    margin-left: 0;
    margin-top: 12px;
    display: inline-flex;
    border-color: rgba(79, 70, 229, 0.15);
    color: var(--accent-primary);
}

.core-github-link:hover {
    background: rgba(79, 70, 229, 0.07);
    border-color: rgba(79, 70, 229, 0.25);
    color: var(--accent-primary);
}

/* GitHub CTA Banner */
.github-cta {
    background: linear-gradient(145deg, #0F172A 0%, #1a2744 100%);
    border-radius: 36px;
    padding: 72px 80px;
    text-align: center;
    margin: 0 0 160px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: 0 40px 80px -20px rgba(15,23,42,0.45),
                inset 0 1px 0 rgba(255,255,255,0.05);
}

.github-cta::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.github-cta-icon {
    font-size: 2.8rem;
    color: rgba(255,255,255,0.65);
    margin-bottom: 24px;
}

.github-cta h2 {
    font-size: 2.8rem;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.github-cta p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.45);
    max-width: 540px;
    margin: 0 auto 40px;
    line-height: 1.75;
}

.github-cta .btn-primary {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.18);
    backdrop-filter: blur(10px);
    box-shadow: none;
}

.github-cta .btn-primary:hover {
    background: rgba(255,255,255,0.22);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.github-cta-ghost {
    position: absolute;
    bottom: -15px;
    right: 48px;
    font-family: var(--font-heading);
    font-size: 11rem;
    font-weight: 800;
    color: rgba(255,255,255,0.025);
    pointer-events: none;
    user-select: none;
    line-height: 1;
    letter-spacing: -0.05em;
}

/* Section divider */
.section-divider {
    height: 1px;
    background: rgba(0,0,0,0.05);
    margin: 48px 0;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .client-grid { grid-template-columns: 1fr; }
    .core-grid { grid-template-columns: repeat(2, 1fr); }
    .ios-app-grid { grid-template-columns: 1fr; }
    .github-cta { padding: 56px 48px; }
    .github-cta h2 { font-size: 2.2rem; }
}

@media (max-width: 768px) {
    .download-hero { padding-top: 160px; padding-bottom: 48px; }
    .download-hero h1 { font-size: 3rem; }
    .download-hero .hero-desc { font-size: 1.05rem; }
    .platform-tabs { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding: 0 20px; scrollbar-width: none; }
    .platform-tabs::-webkit-scrollbar { display: none; }
    .client-card-body { padding: 28px 24px 20px; }
    .client-card-footer { padding: 18px 24px; }
    .github-cta { padding: 44px 28px; border-radius: 24px; }
    .github-cta h2 { font-size: 1.8rem; }
    .github-cta .github-cta-ghost { display: none; }
    .core-grid { grid-template-columns: 1fr; }
    .panel-header h2 { font-size: 2rem; }
    .ios-notice-card { flex-direction: column; gap: 12px; }
    .platform-quick-jump { gap: 8px; padding-top: 40px; }
    .quick-jump-btn { padding: 13px 22px; font-size: 0.92rem; }
}

@media (max-width: 480px) {
    .client-card-head { flex-wrap: wrap; }
    .recommended-badge, .classic-badge { align-self: flex-start; }
    .dl-btn { font-size: 0.82rem; padding: 9px 14px; }
}