/* ============================================
   OpenHash 홈 페이지 전용 스타일
   ============================================ */

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a3a6e 0%, #2d5a87 100%);
    padding: 5rem 0;
    text-align: center;
    color: white;
}
.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}
.hero-title .highlight {
    color: #d4a017;
}
.hero-desc {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}
.btn-primary {
    background: #d4a017;
    color: #1a3a6e;
}
.btn-primary:hover {
    background: #b8860b;
}
.btn-outline {
    border: 2px solid rgba(255,255,255,0.5);
    color: white;
}
.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: white;
}

/* Section Common */
.section {
    padding: 4rem 0;
}
.section.alt {
    background: #f8f9fa;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}
.section-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #e9ecef;
    color: #6c757d;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #212529;
    margin-bottom: 0.75rem;
}
.section-title .highlight {
    color: #1a3a6e;
}
.section-desc {
    font-size: 1rem;
    color: #6c757d;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Card Grid - 4열 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.card {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.25s ease;
    text-align: center;
}
.card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
    border-color: #adb5bd;
}
.card.active {
    border-color: #1a3a6e;
    box-shadow: 0 4px 16px rgba(26,58,110,0.2);
    background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 100%);
}
.card-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    background: #f1f3f5;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all 0.2s;
}
.card:hover .card-icon,
.card.active .card-icon {
    background: #1a3a6e;
}
.card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}
.card.active h4 {
    color: #1a3a6e;
}
.card p {
    font-size: 0.8rem;
    color: #6c757d;
    line-height: 1.5;
}

/* Detail Panel */
.detail-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease, margin 0.3s ease;
    opacity: 0;
    margin-top: 0;
}
.detail-panel.open {
    max-height: 700px;
    opacity: 1;
    margin-top: 1.5rem;
}
.detail-content {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 2rem;
    position: relative;
}
.detail-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: #f1f3f5;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.detail-close:hover {
    background: #dee2e6;
}
.detail-close svg {
    width: 16px;
    height: 16px;
    stroke: #6c757d;
}
.detail-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e9ecef;
}
.detail-header .icon {
    font-size: 2rem;
}
.detail-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #212529;
    margin: 0;
}
.detail-body {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
}
.detail-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.detail-stat {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 1rem;
    text-align: center;
}
.detail-stat.highlight {
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
}
.detail-stat .value {
    display: block;
    font-size: 1.4rem;
    font-weight: 700;
    color: #1a3a6e;
    margin-bottom: 0.25rem;
}
.detail-stat .label {
    font-size: 0.7rem;
    color: #6c757d;
}
.detail-text h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #343a40;
    margin: 0 0 0.5rem 0;
}
.detail-text h4:not(:first-child) {
    margin-top: 1.25rem;
}
.detail-text p {
    font-size: 0.85rem;
    color: #495057;
    line-height: 1.7;
    margin: 0 0 0.5rem 0;
}
.detail-text strong {
    color: #212529;
}

/* Verification Pipeline */
.verify-pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.verify-step {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    min-width: 150px;
    cursor: pointer;
    transition: all 0.25s ease;
}
.verify-step:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
    border-color: #1a3a6e;
}
.verify-step.active {
    border-color: #1a3a6e;
    box-shadow: 0 4px 16px rgba(26,58,110,0.2);
    background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 100%);
}
.verify-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a3a6e;
    color: white;
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}
.verify-step.active .verify-num {
    background: #d4a017;
}
.verify-content h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #212529;
    margin: 0 0 2px 0;
}
.verify-content p {
    font-size: 0.7rem;
    color: #6c757d;
    margin: 0;
}
.verify-arrow {
    color: #adb5bd;
    font-size: 1rem;
}
.verify-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: #6c757d;
}
.verify-footer strong {
    color: #1a3a6e;
}

/* Performance Cards */
.perf-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.perf-card {
    background: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.25s ease;
}
.perf-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}
.perf-card.active {
    border-color: #1a3a6e;
    box-shadow: 0 4px 16px rgba(26,58,110,0.2);
    background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 100%);
}
.perf-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #212529;
    margin-bottom: 0.5rem;
}
.perf-card p {
    font-size: 0.8rem;
    color: #6c757d;
    margin-bottom: 0.75rem;
}
.perf-bar {
    height: 6px;
    background: #e9ecef;
    border-radius: 3px;
    margin-bottom: 0.5rem;
    overflow: hidden;
}
.perf-bar-fill {
    height: 100%;
    border-radius: 3px;
}
.perf-bar-fill.bitcoin {
    background: #f59e0b;
}
.perf-bar-fill.openhash {
    background: #1a3a6e;
}

/* Footer */
.footer {
    background: #1f2937;
    color: rgba(255,255,255,0.7);
    padding: 2rem 0;
    text-align: center;
    font-size: 0.85rem;
}
.footer a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 1024px) {
    .card-grid,
    .perf-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .verify-arrow {
        display: none;
    }
    .verify-step {
        flex: 1 1 calc(50% - 0.5rem);
        min-width: 140px;
    }
}
@media (max-width: 600px) {
    .card-grid,
    .perf-grid {
        grid-template-columns: 1fr;
    }
    .detail-body {
        grid-template-columns: 1fr;
    }
    .detail-stats {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .detail-stat {
        flex: 1;
        min-width: 90px;
    }
    .verify-step {
        flex: 1 1 100%;
    }
    .hero-title {
        font-size: 1.75rem;
    }
}