@charset "utf-8";

/* ============================================
   텔레그램 포터블(무설치) 버전 가이드
   접두사: tg-ptb- (기존 사이트 오염 방지)
   컬러 톤: 건메탈(Gunmetal) + 라임 그린(Lime Green)
============================================ */

:root {
    --tgpt-gunmetal: #374151;
    --tgpt-gunmetal-dark: #1f2937;
    --tgpt-gunmetal-deep: #111827;
    --tgpt-lime: #84cc16;
    --tgpt-lime-dark: #65a30d;
    --tgpt-lime-light: #f7fee7;
    --tgpt-lime-border: #bef264;
    --tgpt-amber: #f59e0b;
    --tgpt-amber-light: #fffbeb;
    --tgpt-green: #10b981;
    --tgpt-green-light: #ecfdf5;
    --tgpt-slate-900: #0f172a;
    --tgpt-slate-700: #334155;
    --tgpt-slate-500: #64748b;
    --tgpt-slate-300: #cbd5e1;
    --tgpt-slate-200: #e2e8f0;
    --tgpt-slate-100: #f1f5f9;
    --tgpt-bg: #f3f4f6;
    --tgpt-white: #ffffff;
    --tgpt-radius: 14px;
}

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

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

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

.tg-ptb-wrapper mark {
    background: linear-gradient(120deg, var(--tgpt-lime-light) 0%, #ecfccb 100%);
    color: #365314;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
}

/* ─── 히어로 헤더 ─── */
.tg-ptb-hero {
    background: linear-gradient(145deg, #030712 0%, #111827 30%, #374151 70%, #84cc16 100%);
    color: var(--tgpt-white);
    padding: 60px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tg-ptb-hero::before {
    content: "";
    position: absolute;
    width: 360px;
    height: 360px;
    border: 60px solid rgba(132, 204, 22, 0.05);
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.tg-ptb-hero::after {
    content: "";
    position: absolute;
    width: 220px;
    height: 220px;
    border: 40px solid rgba(190, 242, 100, 0.04);
    border-radius: 50%;
    bottom: -60px;
    left: -50px;
}

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

.tg-ptb-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(132, 204, 22, 0.12);
    color: var(--tgpt-lime-border);
    font-size: 14px;
    font-weight: 700;
    padding: 8px 20px;
    border-radius: 100px;
    margin-bottom: 22px;
    border: 1px solid rgba(190, 242, 100, 0.15);
    backdrop-filter: blur(4px);
}

.tg-ptb-hero__badge i {
    font-size: 16px;
}

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

.tg-ptb-hero__desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 620px;
    margin: 0 auto;
}

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

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

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

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

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

.tg-ptb-section--dark {
    background: linear-gradient(135deg, var(--tgpt-gunmetal-deep) 0%, var(--tgpt-gunmetal-dark) 100%);
    border-color: var(--tgpt-gunmetal);
    color: var(--tgpt-slate-300);
}

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

.tg-ptb-section__num {
    font-size: 38px;
    font-weight: 900;
    color: var(--tgpt-lime);
    opacity: 0.2;
    line-height: 1;
    flex-shrink: 0;
}

.tg-ptb-section__num--light {
    color: var(--tgpt-lime-border);
    opacity: 0.3;
}

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

.tg-ptb-section__title--light {
    color: var(--tgpt-white);
}

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

.tg-ptb-section__desc--light {
    color: var(--tgpt-slate-300);
}

.tg-ptb-section__desc--light strong {
    color: var(--tgpt-white);
}

/* ─── 장점 3열 ─── */
.tg-ptb-advantages {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.tg-ptb-advantage {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px;
    background-color: var(--tgpt-lime-light);
    border-radius: 10px;
    border: 1px solid #d9f99d;
}

.tg-ptb-advantage__icon {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--tgpt-gunmetal-dark) 0%, var(--tgpt-gunmetal) 100%);
    color: var(--tgpt-lime);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.tg-ptb-advantage__title {
    font-size: 15px;
    font-weight: 800;
    color: #365314;
    margin-bottom: 2px;
}

.tg-ptb-advantage__text {
    font-size: 13px;
    color: #4d7c0f;
}

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

.tg-ptb-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background-color: var(--tgpt-slate-100);
    padding: 16px 18px;
    border-radius: 10px;
    border-left: 3px solid var(--tgpt-lime-border);
    transition: border-left-color 0.2s ease;
}

.tg-ptb-step:hover {
    border-left-color: var(--tgpt-lime);
}

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

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

.tg-ptb-step__text p {
    margin-bottom: 8px;
}

/* 다운로드 링크 버튼 */
.tg-ptb-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--tgpt-white);
    background: linear-gradient(135deg, var(--tgpt-gunmetal-dark) 0%, var(--tgpt-gunmetal) 100%);
    padding: 8px 18px;
    border-radius: 100px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.tg-ptb-link-btn:hover {
    opacity: 0.85;
}

.tg-ptb-link-btn i {
    font-size: 12px;
}

/* 인라인 팁 */
.tg-ptb-tip-inline {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: #4d7c0f;
    background-color: var(--tgpt-lime-light);
    padding: 10px 14px;
    border-radius: 6px;
    border-left: 3px solid var(--tgpt-lime-border);
}

.tg-ptb-tip-inline i {
    color: var(--tgpt-lime);
    margin-top: 2px;
}

/* ─── 보안 3열 카드 ─── */
.tg-ptb-security-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.tg-ptb-security-card {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(132, 204, 22, 0.15);
    border-radius: 12px;
    padding: 24px 20px;
    position: relative;
}

.tg-ptb-security-card__badge {
    position: absolute;
    top: -10px;
    left: 18px;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--tgpt-lime) 0%, var(--tgpt-lime-dark) 100%);
    color: var(--tgpt-white);
    font-weight: 900;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.tg-ptb-security-card__icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, rgba(132, 204, 22, 0.15) 0%, rgba(190, 242, 100, 0.1) 100%);
    color: var(--tgpt-lime);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: 12px;
    margin-top: 6px;
}

.tg-ptb-security-card__title {
    font-size: 16px;
    font-weight: 800;
    color: var(--tgpt-white);
    margin-bottom: 2px;
}

.tg-ptb-security-card__subtitle {
    font-size: 12px;
    color: var(--tgpt-lime-border);
    font-weight: 600;
    margin-bottom: 12px;
}

.tg-ptb-security-card__steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.tg-ptb-security-card__steps li {
    position: relative;
    padding-left: 18px;
    font-size: 13px;
    color: var(--tgpt-slate-300);
}

.tg-ptb-security-card__steps li::before {
    content: "\f054";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 3px;
    font-size: 8px;
    color: var(--tgpt-lime);
}

.tg-ptb-security-card__steps li strong {
    color: var(--tgpt-white);
}

.tg-ptb-security-card__note {
    font-size: 11px;
    color: var(--tgpt-slate-500);
    margin-top: 10px;
    font-style: italic;
}

.tg-ptb-security-card__note i {
    color: var(--tgpt-lime);
    margin-right: 4px;
}

/* ─── 결론 및 요약 ─── */
.tg-ptb-summary {
    background: linear-gradient(135deg, #030712 0%, var(--tgpt-gunmetal-deep) 50%, #365314 100%);
    color: var(--tgpt-white);
    padding: 44px 28px;
    border-radius: var(--tgpt-radius);
    text-align: center;
    box-shadow: 0 10px 30px rgba(3, 7, 18, 0.4);
}

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

.tg-ptb-summary__body p {
    font-size: 16px;
    margin-bottom: 14px;
    color: var(--tgpt-lime-border);
}

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

.tg-ptb-summary strong {
    color: var(--tgpt-white);
}

/* 체크리스트 */
.tg-ptb-summary__checklist {
    list-style: none;
    display: inline-block;
    text-align: left;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 24px 32px;
    border-radius: 12px;
    margin: 24px 0;
}

.tg-ptb-summary__checklist li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 10px;
    font-size: 15px;
    color: #ecfccb;
}

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

.tg-ptb-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: var(--tgpt-lime);
}

.tg-ptb-summary__checklist strong {
    color: var(--tgpt-white);
}

.tg-ptb-summary__footer {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 14px;
    color: var(--tgpt-lime-border);
    line-height: 1.8;
}

.tg-ptb-summary__footer strong {
    color: var(--tgpt-white);
}

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

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

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

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

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

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

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

    /* 장점 3열 */
    .tg-ptb-advantages {
        grid-template-columns: repeat(3, 1fr);
    }

    /* 보안 3열 */
    .tg-ptb-security-cards {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

/* ============================================
   스크롤 등장 애니메이션 (JS 연동)
============================================ */
.tg-ptb-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-ptb-motion.is-visible {
    opacity: 1;
    transform: translateY(0);
}