/* ================================================================
   AI Sub-page Shared Styles
   Used by: ai-ios.html, ai-macos.html, ai-windows.html,
            ai-android.html, ai-privacy.html, ai-pay.html
   ================================================================ */

/* Section Helpers */
.subpage-section {
    padding: 80px 0;
}

.subpage-section-alt {
    background: var(--bg-secondary, #f5f7fa);
}

.section-header-center {
    text-align: center;
    margin-bottom: 48px;
}

.section-header-center .section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-blue, #007AFF);
    margin-bottom: 12px;
}

.section-header-center .section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 12px;
}

.section-header-center .section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary, #6e6e73);
    max-width: 560px;
    margin: 0 auto;
}

/* Feature Cards Row */
.features-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
    max-width: 960px;
    margin: 0 auto;
}

.subpage-card {
    background: var(--bg-card, rgba(255, 255, 255, 0.85));
    border: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
    border-radius: 18px;
    padding: 32px 28px;
    transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.subpage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.10);
    border-color: var(--card-border-hover, rgba(0, 122, 255, 0.35));
}

.subpage-card-icon {
    font-size: 2rem;
    margin-bottom: 14px;
}

.subpage-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 10px;
}

.subpage-card p {
    font-size: 0.95rem;
    color: var(--text-secondary, #6e6e73);
    line-height: 1.6;
}

/* Accuracy Grid */
.accuracy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 24px;
    max-width: 640px;
    margin: 0 auto;
}

.accuracy-item {
    text-align: center;
    background: var(--bg-card, rgba(255, 255, 255, 0.85));
    border: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
    border-radius: 16px;
    padding: 28px 16px;
    transition: transform 0.25s, box-shadow 0.25s;
}

.accuracy-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 122, 255, 0.10);
}

.accuracy-value {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-blue, #007AFF);
    margin-bottom: 6px;
}

.accuracy-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary, #6e6e73);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Install Steps */
.install-steps {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.install-step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--bg-card, rgba(255, 255, 255, 0.85));
    border: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
    border-radius: 16px;
    padding: 24px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.install-step:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.08);
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, #007AFF, #5856D6);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
}

.install-step h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 6px;
}

.install-step p {
    font-size: 0.92rem;
    color: var(--text-secondary, #6e6e73);
    line-height: 1.55;
}

.install-step code {
    background: rgba(0, 122, 255, 0.08);
    padding: 2px 7px;
    border-radius: 5px;
    font-size: 0.88rem;
    color: var(--accent-blue, #007AFF);
}

/* Policy Content */
.policy-content {
    max-width: 740px;
    margin: 0 auto;
}

.policy-block {
    margin-bottom: 36px;
}

.policy-block h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid rgba(0, 122, 255, 0.12);
}

.policy-block p {
    font-size: 0.96rem;
    color: var(--text-secondary, #6e6e73);
    line-height: 1.7;
}

.policy-block a {
    color: var(--accent-blue, #007AFF);
    text-decoration: none;
    font-weight: 600;
}

.policy-block a:hover {
    text-decoration: underline;
}

/* Warning Box */
.policy-warning {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: #FFF5F5;
    border: 1px solid #FEB2B2;
    border-left: 4px solid #E53E3E;
    border-radius: 12px;
    padding: 24px;
    margin: 36px 0;
}

.policy-warning .warning-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.policy-warning h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #C53030;
    margin-bottom: 8px;
}

.policy-warning p {
    font-size: 0.92rem;
    color: #742A2A;
    line-height: 1.6;
}

/* Payment Card */
.payment-card {
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
    background: var(--bg-card, rgba(255, 255, 255, 0.85));
    border: 2px solid var(--accent-blue, #007AFF);
    border-radius: 24px;
    padding: 48px 36px;
    box-shadow: 0 16px 48px rgba(0, 122, 255, 0.12);
}

.price-tag {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 24px;
}

.price-currency {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-secondary, #6e6e73);
}

.price-amount {
    font-size: 3.4rem;
    font-weight: 800;
    color: var(--accent-blue, #007AFF);
    line-height: 1;
}

.price-period {
    font-size: 0.9rem;
    color: var(--text-secondary, #6e6e73);
    font-weight: 500;
}

.payment-includes {
    list-style: none;
    padding: 0;
    margin: 0 0 32px;
    text-align: left;
}

.payment-includes li {
    font-size: 0.92rem;
    color: var(--text-primary, #1c1c1e);
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.payment-includes li:last-child {
    border-bottom: none;
}

/* Crypto Grid */
.crypto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
    max-width: 760px;
    margin: 0 auto 32px;
}

.crypto-card {
    background: var(--bg-card, rgba(255, 255, 255, 0.85));
    border: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
    border-radius: 20px;
    padding: 32px 28px;
    text-align: center;
    transition: transform 0.25s, box-shadow 0.25s;
}

.crypto-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.10);
}

.crypto-header {
    margin-bottom: 20px;
}

.crypto-icon {
    display: block;
    font-size: 2rem;
    margin-bottom: 8px;
}

.crypto-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 4px;
}

.crypto-network {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-secondary, #6e6e73);
}

.crypto-address {
    background: var(--bg-secondary, #f5f7fa);
    border-radius: 10px;
    padding: 14px 12px;
    margin-bottom: 16px;
    word-break: break-all;
}

.crypto-address code {
    font-size: 0.78rem;
    color: var(--text-primary, #1c1c1e);
    font-weight: 500;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-blue, #007AFF);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 10px 22px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
}

.copy-btn:hover {
    background: #0066d6;
    transform: translateY(-1px);
}

/* Crypto Note */
.crypto-note {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: #FFFFF0;
    border: 1px solid #F6E05E;
    border-left: 4px solid #ECC94B;
    border-radius: 12px;
    padding: 20px 24px;
    max-width: 760px;
    margin: 0 auto;
}

.crypto-note .warning-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.crypto-note h4 {
    font-size: 0.98rem;
    font-weight: 700;
    color: #744210;
    margin-bottom: 6px;
}

.crypto-note p {
    font-size: 0.9rem;
    color: #744210;
    line-height: 1.55;
}

/* Back link in footer */
.back-link {
    color: var(--accent-blue, #007AFF);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

.back-link:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .subpage-section {
        padding: 56px 0;
    }

    .section-header-center .section-title {
        font-size: 1.6rem;
    }

    .features-row {
        grid-template-columns: 1fr;
    }

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

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

    .payment-card {
        padding: 32px 24px;
    }

    .price-amount {
        font-size: 2.6rem;
    }
}

/* Discovery Section */
.discovery-section {
    padding: 80px 0;
    background: var(--bg-secondary, #f5f7fa);
    border-top: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
}

.discovery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}

.discovery-card {
    background: var(--bg-card, #ffffff);
    border: 1px solid var(--card-border, rgba(0, 122, 255, 0.12));
    border-radius: 24px;
    padding: 40px 32px;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.discovery-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 122, 255, 0.12);
    border-color: var(--accent-blue, #007AFF);
}

.discovery-icon-wrap {
    width: 80px;
    height: 80px;
    background: rgba(0, 122, 255, 0.05);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.discovery-card:hover .discovery-icon-wrap {
    background: rgba(0, 122, 255, 0.1);
    transform: scale(1.05);
}

.discovery-icon-wrap img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.discovery-card h3 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary, #1c1c1e);
    margin-bottom: 12px;
}

.discovery-card p {
    font-size: 1rem;
    color: var(--text-secondary, #6e6e73);
    line-height: 1.6;
    margin-bottom: 24px;
}

.discovery-cta {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--accent-blue, #007AFF);
    transition: gap 0.2s ease;
}

.discovery-card:hover .discovery-cta {
    text-decoration: underline;
}

/* Responsive Overrides */
@media (max-width: 768px) {
    .discovery-grid {
        grid-template-columns: 1fr;
    }
    
    .discovery-card {
        padding: 32px 24px;
    }
}