/* ============================================================
   about.css - KL Master 소개 페이지 스타일
   ============================================================ */


/* ============================================================
   히어로
   ============================================================ */
.about-hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(160deg, #0a0a0a 0%, #141414 50%, #0f0f0f 100%);
    position: relative;
    overflow: hidden;
}

.about-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(232,184,75,0.3), transparent);
}

.about-hero-inner {
    max-width: 780px;
}

.about-hero-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(232,184,75,0.1);
    border: 1px solid rgba(232,184,75,0.3);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.about-hero-title {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    letter-spacing: -1px;
    margin-bottom: var(--spacing-md);
}

.about-hero-title em {
    font-style: normal;
    color: var(--color-primary);
}

.about-hero-desc {
    font-size: var(--font-size-md);
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
    margin-bottom: var(--spacing-2xl);
}

.about-hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.about-stat strong {
    font-size: clamp(22px, 4vw, 32px);
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.5px;
    line-height: 1;
}

.about-stat span {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.4);
}

.about-stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255,255,255,0.12);
}


/* ============================================================
   핵심 가치
   ============================================================ */
.about-values {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg);
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.value-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    transition: border-color var(--transition), transform var(--transition);
    position: relative;
}

.value-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.value-card-featured {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.value-featured-badge {
    display: inline-flex;
    background: var(--color-primary);
    color: #1a1a1a;
    font-size: 10px;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.value-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-md);
}

.value-title {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.value-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.value-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.value-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.value-list li::before {
    content: '✓';
    color: var(--color-primary);
    font-weight: 800;
    flex-shrink: 0;
}


/* ============================================================
   3단계 인증 시스템
   ============================================================ */
.about-system {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
}

.system-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
}

.system-step {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    flex: 1;
    transition: border-color var(--transition);
}

.system-step:hover { border-color: var(--color-primary); }

.system-step-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.system-step-num {
    font-size: 11px;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 2px;
    background: var(--color-primary-bg);
    border: 1px solid rgba(232,184,75,0.2);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

.system-step-icon {
    font-size: 36px;
}

.system-step-title {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 8px;
}

.system-step-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.system-step-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.system-step-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.system-step-list li::before {
    content: '→';
    color: var(--color-primary);
    font-weight: 700;
    flex-shrink: 0;
}

.system-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.system-connector-line {
    width: 2px;
    height: 24px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
}

.system-connector-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    margin-top: 4px;
}


/* ============================================================
   숫자로 보는 KL Master
   ============================================================ */
.about-numbers {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg);
}

.numbers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.number-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: border-color var(--transition), transform var(--transition);
}

.number-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.number-value {
    display: block;
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 6px;
}

.number-unit {
    font-size: 0.55em;
    font-weight: 700;
    letter-spacing: 0;
}

.number-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.number-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    line-height: 1.5;
}


/* ============================================================
   구매 프로세스
   ============================================================ */
.about-process {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-secondary);
}

.about-process-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.about-process-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    transition: border-color var(--transition);
}

.about-process-item:hover { border-color: var(--color-primary); }

.about-process-num {
    font-size: 11px;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.about-process-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
}

.about-process-title {
    font-size: var(--font-size-md);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 6px;
}

.about-process-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}


/* ============================================================
   고객 후기
   ============================================================ */
.about-reviews {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg);
}

.about-reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.about-review-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    transition: border-color var(--transition);
}

.about-review-card:hover { border-color: var(--color-primary); }

.about-review-stars {
    color: var(--color-primary);
    font-size: 16px;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.about-review-content {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-review-author {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-xs);
}

.about-review-author strong {
    color: var(--color-text);
    font-weight: 700;
}

.about-review-author span {
    color: var(--color-text-muted);
}


/* ============================================================
   하단 CTA
   ============================================================ */
.about-cta {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, #0a0a0a, #1a1a1a);
    text-align: center;
}

.about-cta-title {
    font-size: clamp(24px, 4vw, 40px);
    font-weight: 800;
    color: #fff;
    margin-bottom: var(--spacing-sm);
}

.about-cta-desc {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.5);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.about-cta-btns {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-cta-btns .btn-outline {
    color: rgba(255,255,255,0.7);
    border-color: rgba(255,255,255,0.25);
}
.about-cta-btns .btn-outline:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}


/* ============================================================
   반응형 PC (768px+)
   ============================================================ */
@media (min-width: 768px) {
    .about-hero { padding: calc(var(--spacing-2xl) * 1.5) 0; }

    .values-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .system-steps {
        flex-direction: row;
        align-items: stretch;
    }

    .system-connector {
        flex-direction: row;
        padding: 0 var(--spacing-xs);
        align-items: center;
        align-self: center;
    }

    .system-connector-line {
        width: 24px;
        height: 2px;
        background: linear-gradient(to right, var(--color-primary), transparent);
    }

    .system-connector-dot {
        margin-top: 0;
        margin-left: 4px;
    }

    .numbers-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-process-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-cta-btns {
        flex-direction: row;
        justify-content: center;
    }
}

@media (min-width: 1024px) {
    .numbers-grid { grid-template-columns: repeat(6, 1fr); }
    .about-process-grid { grid-template-columns: repeat(3, 1fr); }
    .about-hero-title { font-size: 52px; }
}