@charset "utf-8";

/* ============================================
   텔레그램 비밀대화 가이드
   접두사: tg-secret- (기존 사이트 오염 방지)
   컬러 톤: 딥 퍼플(Deep Purple) + 다크 슬레이트
============================================ */

:root {
    --tgsc-purple: #7c3aed;
    --tgsc-purple-dark: #6d28d9;
    --tgsc-purple-deep: #4c1d95;
    --tgsc-purple-light: #ede9fe;
    --tgsc-purple-border: #c4b5fd;
    --tgsc-slate-900: #0f172a;
    --tgsc-slate-700: #334155;
    --tgsc-slate-500: #64748b;
    --tgsc-slate-200: #e2e8f0;
    --tgsc-slate-100: #f1f5f9;
    --tgsc-bg: #f8f9fb;
    --tgsc-white: #ffffff;
    --tgsc-amber: #f59e0b;
    --tgsc-amber-light: #fffbeb;
    --tgsc-amber-border: #fde68a;
    --tgsc-radius: 14px;
}

/* ─── 래퍼 ─── */
.tg-secret-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    color: var(--tgsc-slate-500);
    background-color: var(--tgsc-bg);
    box-sizing: border-box;
    line-height: 1.7;
    overflow: hidden;
    padding-bottom: 60px;
}

.tg-secret-wrapper *,
.tg-secret-wrapper *::before,
.tg-secret-wrapper *::after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}

.tg-secret-wrapper strong {
    font-weight: 700;
    color: var(--tgsc-slate-900);
}

.tg-secret-wrapper mark {
    background: linear-gradient(120deg, var(--tgsc-purple-light) 0%, #ddd6fe 100%);
    color: var(--tgsc-purple-deep);
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
}

.tg-secret-wrapper em {
    font-style: italic;
    color: var(--tgsc-slate-500);
}

/* ─── 히어로 헤더 ─── */
.tg-secret-hero {
    background: linear-gradient(145deg, #1e1b4b 0%, #4c1d95 45%, #7c3aed 100%);
    color: var(--tgsc-white);
    padding: 60px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 장식: 암호화 느낌 원형 패턴 */
.tg-secret-hero::before {
    content: "";
    position: absolute;
    width: 320px;
    height: 320px;
    border: 50px solid rgba(255, 255, 255, 0.03);
    border-radius: 50%;
    top: -80px;
    right: -80px;
}

.tg-secret-hero::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    border: 35px solid rgba(255, 255, 255, 0.025);
    border-radius: 50%;
    bottom: -50px;
    left: -40px;
}

.tg-secret-hero__inner {
    position: relative;
    z-index: 1;
}

.tg-secret-hero__badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--tgsc-white);
    font-size: 14px;
    font-weight: 700;
    padding: 8px 18px;
    border-radius: 100px;
    margin-bottom: 22px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(4px);
}

.tg-secret-hero__title {
    font-size: 28px;
    font-weight: 900;
    line-height: 1.35;
    margin-bottom: 18px;
    color: var(--tgsc-white);
}

.tg-secret-hero__desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.75);
    max-width: 600px;
    margin: 0 auto;
}

/* ─── 메인 ─── */
.tg-secret-main {
    padding: 30px 20px 0;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* ─── 도입부 ─── */
.tg-secret-intro {
    background-color: var(--tgsc-white);
    padding: 28px 24px;
    border-radius: var(--tgsc-radius);
    border-left: 4px solid var(--tgsc-purple);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}

.tg-secret-intro p {
    font-size: 16px;
    margin-bottom: 14px;
}

.tg-secret-intro p:last-child {
    margin-bottom: 0;
}

/* ─── 섹션 공통 ─── */
.tg-secret-section {
    background-color: var(--tgsc-white);
    padding: 34px 24px;
    border-radius: var(--tgsc-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--tgsc-slate-200);
}

.tg-secret-section__head {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 16px;
}

.tg-secret-section__num {
    font-size: 38px;
    font-weight: 900;
    color: var(--tgsc-purple);
    opacity: 0.25;
    line-height: 1;
    flex-shrink: 0;
}

.tg-secret-section__title {
    font-size: 20px;
    font-weight: 800;
    color: var(--tgsc-slate-900);
    line-height: 1.35;
    padding-top: 6px;
}

.tg-secret-section__desc {
    font-size: 16px;
    margin-bottom: 24px;
}

/* ─── 보안 특징 카드 (01) ─── */
.tg-secret-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.tg-secret-feature {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--tgsc-slate-100);
    padding: 18px;
    border-radius: 10px;
    transition: background-color 0.2s ease;
}

.tg-secret-feature:hover {
    background-color: #eef0f5;
}

.tg-secret-feature__icon {
    font-size: 26px;
    flex-shrink: 0;
    line-height: 1;
    margin-top: 2px;
    color: var(--tgsc-purple);
}

.tg-secret-feature__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tgsc-slate-900);
    margin-bottom: 4px;
}

.tg-secret-feature__text {
    font-size: 14px;
}

/* ─── 스텝 리스트 ─── */
.tg-secret-steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.tg-secret-steps--compact {
    gap: 10px;
    margin-bottom: 0;
}

.tg-secret-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--tgsc-slate-100);
    padding: 16px 18px;
    border-radius: 10px;
    border-left: 3px solid var(--tgsc-purple-border);
}

.tg-secret-step__marker {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--tgsc-purple) 0%, var(--tgsc-purple-dark) 100%);
    color: var(--tgsc-white);
    font-weight: 800;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-top: 1px;
}

.tg-secret-step__text {
    font-size: 15px;
    padding-top: 3px;
}

/* ─── 중요 안내 콜아웃 ─── */
.tg-secret-callout {
    display: flex;
    gap: 14px;
    padding: 20px;
    background-color: var(--tgsc-amber-light);
    border: 1px solid var(--tgsc-amber-border);
    border-radius: 10px;
}

.tg-secret-callout__icon {
    font-size: 28px;
    flex-shrink: 0;
    line-height: 1;
    color: var(--tgsc-amber);
}

.tg-secret-callout__title {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: #92400e;
    margin-bottom: 6px;
}

.tg-secret-callout__text {
    font-size: 14px;
    color: #a16207;
}

/* ─── 서브 섹션 (03 내부) ─── */
.tg-secret-subsection {
    background-color: var(--tgsc-slate-100);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.tg-secret-subsection:last-child {
    margin-bottom: 0;
}

.tg-secret-subsection__title {
    font-size: 18px;
    font-weight: 800;
    color: var(--tgsc-slate-900);
    margin-bottom: 8px;
}

.tg-secret-subsection__title i {
    color: var(--tgsc-purple);
    margin-right: 4px;
}

.tg-secret-subsection__desc {
    font-size: 15px;
    color: var(--tgsc-slate-500);
    margin-bottom: 16px;
}

/* 서브 섹션 내부 스텝은 약간 밝은 배경 */
.tg-secret-subsection .tg-secret-step {
    background-color: var(--tgsc-white);
    border-left-color: var(--tgsc-purple-light);
}

/* ─── 결론 및 요약 ─── */
.tg-secret-summary {
    background: linear-gradient(135deg, #1e1b4b 0%, var(--tgsc-purple-deep) 100%);
    color: var(--tgsc-white);
    padding: 44px 28px;
    border-radius: var(--tgsc-radius);
    text-align: center;
    box-shadow: 0 10px 30px rgba(76, 29, 149, 0.25);
}

.tg-secret-summary__title {
    font-size: 24px;
    font-weight: 800;
    color: var(--tgsc-white);
    margin-bottom: 20px;
}

.tg-secret-summary__body p {
    font-size: 16px;
    margin-bottom: 14px;
    color: #c4b5fd;
}

.tg-secret-summary__body p:last-child {
    margin-bottom: 0;
}

/* 결론 내 strong 가시성 */
.tg-secret-summary strong,
.tg-secret-summary__body strong {
    color: var(--tgsc-white);
}

/* 체크리스트 */
.tg-secret-summary__checklist {
    list-style: none;
    display: inline-block;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 24px 32px;
    border-radius: 12px;
    margin: 24px 0;
}

.tg-secret-summary__checklist li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    font-size: 16px;
    color: #ddd6fe;
}

.tg-secret-summary__checklist li:last-child {
    margin-bottom: 0;
}

.tg-secret-summary__checklist li::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 13px;
    color: #a78bfa;
}

.tg-secret-summary__checklist strong {
    color: var(--tgsc-white);
}

.tg-secret-summary__footer {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: #a78bfa;
    line-height: 1.8;
}

.tg-secret-summary__footer strong {
    color: var(--tgsc-white);
}

/* ============================================
   반응형 미디어 쿼리 (모바일 퍼스트)
============================================ */
@media (min-width: 768px) {
    .tg-secret-hero {
        padding: 80px 40px;
    }

    .tg-secret-hero__title {
        font-size: 38px;
    }

    .tg-secret-main {
        padding: 40px 36px 0;
        gap: 40px;
    }

    .tg-secret-intro {
        padding: 36px 32px;
    }

    .tg-secret-section {
        padding: 40px 36px;
    }

    .tg-secret-section__title {
        font-size: 24px;
    }

    .tg-secret-section__num {
        font-size: 44px;
    }

    /* 보안 특징 2열 그리드 */
    .tg-secret-features {
        grid-template-columns: repeat(2, 1fr);
    }

    .tg-secret-summary {
        padding: 56px 44px;
    }
}

@media (min-width: 1024px) {
    .tg-secret-hero__title {
        font-size: 44px;
    }

    .tg-secret-main {
        gap: 46px;
    }
}

/* ============================================
   스크롤 등장 애니메이션 (JS 연동)
============================================ */
.tg-secret-motion {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.tg-secret-motion.is-visible {
    opacity: 1;
    transform: translateY(0);
}