/* =====================================================
   독립적 보안감사 컨설팅 Landing Page Styles
   Deep Navy + Teal Trust Theme - Audit / Compliance Aesthetic
   (AVA-Defender 패턴 기반, isa- prefix)
   ===================================================== */

:root {
    --isa-primary: #15315B;
    --isa-primary-light: #1F4373;
    --isa-primary-dark: #0E2240;
    --isa-secondary: #3B7DA8;
    --isa-accent: #0FA37F;
    --isa-accent-hover: #0C8568;
    --isa-success: #0FA37F;
    --isa-warning: #E8A53C;

    /* Light theme backgrounds */
    --isa-bg-primary: #FFFFFF;
    --isa-bg-secondary: #F2F5F9;
    --isa-bg-tertiary: #E5EDF3;
    --isa-bg-card: #FFFFFF;

    /* Text colors */
    --isa-text-primary: #16203A;
    --isa-text-secondary: #495368;
    --isa-text-muted: #828DA3;

    /* Borders and shadows */
    --isa-border: #D4DCE6;
    --isa-shadow-sm: 0 1px 2px 0 rgba(21, 49, 91, 0.05);
    --isa-shadow: 0 4px 6px -1px rgba(21, 49, 91, 0.1), 0 2px 4px -1px rgba(21, 49, 91, 0.06);
    --isa-shadow-lg: 0 10px 15px -3px rgba(21, 49, 91, 0.1), 0 4px 6px -2px rgba(21, 49, 91, 0.05);
    --isa-shadow-xl: 0 20px 25px -5px rgba(21, 49, 91, 0.12), 0 10px 10px -5px rgba(21, 49, 91, 0.04);

    /* Gradients */
    --isa-gradient-primary: linear-gradient(135deg, #15315B 0%, #1F4373 100%);
    --isa-gradient-accent: linear-gradient(135deg, #0FA37F 0%, #3B7DA8 100%);
    --isa-gradient-light: linear-gradient(135deg, #F2F5F9 0%, #E5EDF3 100%);
    --isa-gradient-hero: linear-gradient(180deg, #F2F5F9 0%, #FFFFFF 100%);
}

/* =====================================================
   Base
   ===================================================== */
.isa-page {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--isa-text-primary);
    background: var(--isa-bg-primary);
    overflow-x: hidden;
}

.isa-section { padding: 80px 0; }
.isa-section-alt { background: var(--isa-bg-secondary); }

.isa-section-header {
    text-align: center;
    margin-bottom: 60px;
}

.isa-section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.isa-section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--isa-gradient-accent);
    border-radius: 2px;
}

.isa-section-header p {
    font-size: 1.125rem;
    color: var(--isa-text-secondary);
    max-width: 720px;
    margin: 20px auto 0;
    line-height: 1.7;
}

.isa-section-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--isa-secondary);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 12px;
    text-align: center;
}

/* =====================================================
   Hero
   ===================================================== */
.isa-hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    background: var(--isa-gradient-hero);
    padding: 120px 0 80px;
    overflow: hidden;
}

.isa-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 78%, rgba(21, 49, 91, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 82% 22%, rgba(15, 163, 127, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.isa-hero-content { position: relative; z-index: 2; }

.isa-hero-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.isa-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--isa-primary);
    box-shadow: var(--isa-shadow-sm);
}

.isa-badge i { color: var(--isa-accent); }

.isa-hero h1 {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--isa-text-primary);
    margin-bottom: 24px;
}

.isa-hero h1 .isa-grad {
    background: var(--isa-gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 히어로 두 번째 줄: 첫 줄 대비 절반 크기 (em 기준이라 모든 화면폭에서 자동 반영) */
.isa-hero-h1-sub {
    display: inline-block;
    font-size: 0.5em;
    font-weight: 700;
    line-height: 1.4;
}

.isa-hero-subtitle {
    font-size: 1.1875rem;
    color: var(--isa-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

/* 3대 축 */
.isa-hero-pillars {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.isa-pillar {
    flex: 1;
    min-width: 130px;
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    box-shadow: var(--isa-shadow-sm);
}

.isa-pillar i {
    font-size: 1.5rem;
    color: var(--isa-accent);
    margin-bottom: 6px;
    display: block;
}

.isa-pillar strong {
    display: block;
    font-size: 1rem;
    color: var(--isa-text-primary);
    font-weight: 700;
}

.isa-pillar span {
    font-size: 0.8125rem;
    color: var(--isa-text-muted);
}

.isa-hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.isa-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.isa-btn-primary {
    background: var(--isa-gradient-primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(21, 49, 91, 0.35);
}

.isa-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(21, 49, 91, 0.45);
    color: #fff;
}

.isa-btn-outline {
    background: var(--isa-bg-card);
    color: var(--isa-text-primary);
    border: 2px solid var(--isa-border);
}

.isa-btn-outline:hover {
    border-color: var(--isa-primary);
    color: var(--isa-primary);
    background: var(--isa-bg-secondary);
}

.isa-hero-visual { position: relative; z-index: 2; }

.isa-hero-visual img {
    width: 100%;
    max-width: 560px;
    border-radius: 16px;
    box-shadow: var(--isa-shadow-xl);
}

.isa-hero-visual::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    background: var(--isa-gradient-light);
    border-radius: 16px;
    z-index: -1;
}

/* Hero 카드형 비주얼 (이미지 미확정 시 플레이스홀더 대체) */
.isa-hero-card {
    position: relative;
    z-index: 2;
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 20px;
    padding: 36px;
    box-shadow: var(--isa-shadow-xl);
}

.isa-hero-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.isa-hero-card h4 i { color: var(--isa-accent); }

.isa-hero-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.isa-hero-card li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--isa-border);
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
}

.isa-hero-card li:last-child { border-bottom: none; }
.isa-hero-card li i { color: var(--isa-accent); margin-top: 3px; }

/* =====================================================
   비교표 / 일반 표
   ===================================================== */
.isa-table-wrap { overflow-x: auto; }

.isa-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--isa-shadow);
    min-width: 720px;
}

.isa-table thead th {
    background: var(--isa-gradient-primary);
    color: #fff;
    padding: 16px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    text-align: left;
    white-space: nowrap;
}

.isa-table tbody td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--isa-border);
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
    background: var(--isa-bg-card);
    vertical-align: middle;
}

.isa-table tbody td:first-child {
    font-weight: 700;
    color: var(--isa-text-primary);
}

.isa-table tbody tr:last-child td { border-bottom: none; }
.isa-table tbody tr:hover td { background: var(--isa-bg-secondary); }

.isa-cert-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.8125rem;
    font-weight: 700;
}

.isa-cert-csap { background: rgba(21, 49, 91, 0.1); color: var(--isa-primary); }
.isa-cert-isms { background: rgba(59, 125, 168, 0.15); color: var(--isa-secondary); }
.isa-cert-iso { background: rgba(15, 163, 127, 0.12); color: var(--isa-accent-hover); }

.isa-pill-req {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-weight: 600;
    color: var(--isa-accent-hover);
}

/* 제도별 설명 카드 */
.isa-regime-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.isa-regime-card {
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-top: 4px solid var(--isa-secondary);
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s ease;
    box-shadow: var(--isa-shadow);
}

.isa-regime-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--isa-shadow-lg);
}

.isa-regime-card h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--isa-primary);
    margin-bottom: 6px;
}

.isa-regime-card .isa-regime-clause {
    font-size: 0.8125rem;
    color: var(--isa-text-muted);
    margin-bottom: 14px;
    display: block;
}

.isa-regime-card p {
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
    line-height: 1.65;
    margin: 0;
}

.isa-callout {
    margin-top: 40px;
    background: var(--isa-bg-tertiary);
    border-left: 4px solid var(--isa-accent);
    border-radius: 12px;
    padding: 24px 28px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.isa-callout i {
    font-size: 1.5rem;
    color: var(--isa-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.isa-callout p {
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
    margin: 0;
    line-height: 1.7;
}

/* =====================================================
   리스크 카드
   ===================================================== */
.isa-risk-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.isa-risk-card {
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
    box-shadow: var(--isa-shadow);
}

.isa-risk-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--isa-shadow-lg);
    border-color: var(--isa-secondary);
}

.isa-risk-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    background: linear-gradient(135deg, rgba(232, 165, 60, 0.14) 0%, rgba(232, 165, 60, 0.06) 100%);
    border-radius: 14px;
    font-size: 1.5rem;
    color: var(--isa-warning);
}

.isa-risk-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 10px;
}

.isa-risk-problem {
    font-size: 0.9rem;
    color: var(--isa-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--isa-border);
}

.isa-risk-solution {
    font-size: 0.9rem;
    color: var(--isa-text-primary);
    line-height: 1.6;
    margin: 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.isa-risk-solution i {
    color: var(--isa-accent);
    margin-top: 3px;
    flex-shrink: 0;
}

/* =====================================================
   차별점 (Value) 카드
   ===================================================== */
.isa-value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.isa-value-card {
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--isa-shadow);
}

.isa-value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--isa-shadow-lg);
    border-color: var(--isa-accent);
}

.isa-value-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--isa-gradient-light);
    border-radius: 16px;
    font-size: 2rem;
    color: var(--isa-primary);
}

.isa-value-card h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 12px;
}

.isa-value-card p {
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.isa-cred-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    text-align: left;
    display: inline-block;
}

.isa-cred-list li {
    font-size: 0.875rem;
    color: var(--isa-text-secondary);
    padding: 5px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.isa-cred-list li i { color: var(--isa-accent); font-size: 0.8125rem; }

/* 실적 플레이스홀더 */
.isa-placeholder {
    display: inline-block;
    background: repeating-linear-gradient(45deg, #EEF2F7, #EEF2F7 8px, #E3E9F1 8px, #E3E9F1 16px);
    color: var(--isa-text-muted);
    border-radius: 6px;
    padding: 2px 10px;
    font-size: 0.8125rem;
    font-weight: 600;
}

/* =====================================================
   프로세스 4단계
   ===================================================== */
.isa-flow-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    position: relative;
}

.isa-flow-step {
    flex: 1;
    text-align: center;
    position: relative;
    max-width: 240px;
    padding: 0 12px;
}

.isa-flow-step-number {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    background: var(--isa-gradient-primary);
    border-radius: 50%;
    color: #fff;
    font-size: 1.125rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
}

.isa-flow-step h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 8px;
}

.isa-flow-step p {
    font-size: 0.8375rem;
    color: var(--isa-text-muted);
    margin: 0;
    line-height: 1.55;
}

.isa-flow-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 26px;
    left: calc(50% + 26px);
    width: calc(100% - 52px);
    height: 2px;
    background: var(--isa-border);
    z-index: 1;
}

/* =====================================================
   산출물 카드
   ===================================================== */
.isa-deliverable-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.isa-deliverable-card {
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--isa-shadow);
}

.isa-deliverable-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--isa-shadow-lg);
}

.isa-deliverable-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    background: var(--isa-gradient-accent);
    border-radius: 16px;
    font-size: 1.75rem;
    color: #fff;
}

.isa-deliverable-card h4 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--isa-text-primary);
    margin-bottom: 8px;
}

.isa-deliverable-card p {
    font-size: 0.875rem;
    color: var(--isa-text-muted);
    margin: 0;
}

.isa-deliverable-tag {
    display: inline-block;
    margin-top: 14px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--isa-accent-hover);
    background: rgba(15, 163, 127, 0.1);
    padding: 4px 12px;
    border-radius: 50px;
}

/* =====================================================
   FAQ 아코디언
   ===================================================== */
.isa-faq {
    max-width: 820px;
    margin: 0 auto;
}

.isa-faq-item {
    background: var(--isa-bg-card);
    border: 1px solid var(--isa-border);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.isa-faq-item.active {
    box-shadow: var(--isa-shadow-lg);
    border-color: var(--isa-secondary);
}

.isa-faq-q {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 22px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--isa-text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.isa-faq-q i {
    color: var(--isa-secondary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.isa-faq-item.active .isa-faq-q i { transform: rotate(180deg); }

.isa-faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 28px;
}

.isa-faq-item.active .isa-faq-a {
    max-height: 400px;
    padding: 0 28px 24px;
}

.isa-faq-a p {
    font-size: 0.9375rem;
    color: var(--isa-text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* =====================================================
   CTA
   ===================================================== */
.isa-cta {
    background: var(--isa-gradient-primary);
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.isa-cta h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.isa-cta p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin: 0 auto 32px;
    max-width: 600px;
}

.isa-cta-benefits {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.isa-cta-benefits span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
}

.isa-cta-benefits i { color: var(--isa-accent); }

.isa-btn-white {
    background: #fff;
    color: var(--isa-primary);
    font-weight: 600;
}

.isa-btn-white:hover {
    background: #EEF2F7;
    color: var(--isa-primary-dark);
    transform: translateY(-2px);
}

.isa-contact-info {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    flex-wrap: wrap;
}

.isa-contact-item { text-align: center; }

.isa-contact-item i {
    font-size: 1.5rem;
    margin-bottom: 12px;
    display: block;
}

.isa-contact-item a,
.isa-contact-item span {
    color: #fff;
    font-size: 0.9375rem;
    text-decoration: none;
}

.isa-contact-item a:hover { text-decoration: underline; }

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1199px) {
    .isa-hero h1 { font-size: 2.75rem; }
}

@media (max-width: 991px) {
    .isa-section { padding: 60px 0; }
    .isa-hero { min-height: auto; padding: 100px 0 60px; }
    .isa-hero h1 { font-size: 2.25rem; }
    .isa-hero-visual,
    .isa-hero-card { margin-top: 40px; }

    .isa-regime-grid,
    .isa-risk-grid,
    .isa-value-grid,
    .isa-deliverable-grid { grid-template-columns: 1fr; }

    .isa-flow-steps { flex-direction: column; align-items: center; gap: 16px; }
    .isa-flow-step { max-width: 320px; }
    .isa-flow-step:not(:last-child)::after { display: none; }

    .isa-contact-info { gap: 24px; }
}

@media (max-width: 767px) {
    .isa-section-header h2 { font-size: 1.75rem; }
    .isa-hero h1 { font-size: 1.875rem; }
    .isa-hero-subtitle { font-size: 1rem; }
    .isa-hero-cta { flex-direction: column; }
    .isa-btn { width: 100%; }
    .isa-hero-pillars { flex-direction: column; }
    .isa-cta h2 { font-size: 1.75rem; }
    .isa-cta-benefits { flex-direction: column; gap: 12px; }
    .isa-faq-q { padding: 18px 20px; font-size: 0.9375rem; }
    .isa-faq-item.active .isa-faq-a { padding: 0 20px 20px; }
}

/* =====================================================
   AOS fallback (ava-defender 와 동일)
   ===================================================== */
[data-aos="fade-up"] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

[data-aos="fade-up"].aos-animate {
    opacity: 1;
    transform: translateY(0);
}