/*
 * tips277/style.css  v1.0.0
 * 텔레그램 비슷한 채널 가이드 전용 스타일
 * 그누보드5 완전 격리 | BEM 네이밍 | 모바일 퍼스트
 * 테마: 틸·시안 (발견·탐색·큐레이션)
 */

/* ── 리셋 ── */
#tg-277-wrapper,#tg-277-wrapper *,#tg-277-wrapper *::before,#tg-277-wrapper *::after{box-sizing:border-box;margin:0;padding:0;border:none;outline:none;text-decoration:none;list-style:none;background:none;font-style:normal}
#tg-277-wrapper h1,#tg-277-wrapper h2,#tg-277-wrapper h3,#tg-277-wrapper h4{font-size:inherit;font-weight:inherit;color:inherit;line-height:1.3}
#tg-277-wrapper p{margin-bottom:14px!important;line-height:1.75!important}
#tg-277-wrapper p:last-child{margin-bottom:0!important}

/* ── 변수 ── */
#tg-277-wrapper{
    --teal-400:#2dd4bf;--teal-500:#14b8a6;--teal-600:#0d9488;--teal-700:#0f766e;--teal-800:#115e59;
    --cyan-500:#06b6d4;--cyan-600:#0891b2;
    --amber-500:#f59e0b;--amber-600:#d97706;
    --slate-50:#f8fafc;--slate-100:#f1f5f9;--slate-200:#e2e8f0;--slate-300:#cbd5e1;--slate-400:#94a3b8;--slate-500:#64748b;--slate-700:#334155;--slate-800:#1e293b;--slate-900:#0f172a;
    --text-main:#1e293b;--text-sub:#475569;--border-r:14px;
    --shadow-teal:0 8px 28px rgba(20,184,166,0.12);
}

#tg-277-wrapper.tg-277-wrapper{max-width:1100px;margin:0 auto;width:100%;font-family:'Pretendard','Apple SD Gothic Neo','Malgun Gothic',sans-serif;color:var(--text-main);line-height:1.75;background-color:var(--slate-50);border-radius:20px;overflow:hidden;box-shadow:0 10px 40px rgba(20,184,166,0.08)}

/* ══════ 히어로 ══════ */
#tg-277-wrapper .tg-277-hero{position:relative;background:linear-gradient(135deg,#0f766e 0%,#115e59 60%,#134e4a 100%);padding:52px 24px 52px;text-align:center;overflow:hidden}
#tg-277-wrapper .tg-277-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 25%,rgba(45,212,191,0.2) 0%,transparent 55%),radial-gradient(circle at 25% 75%,rgba(6,182,212,0.12) 0%,transparent 50%);pointer-events:none}
#tg-277-wrapper .tg-277-hero::after{content:'';position:absolute;bottom:-1px;left:0;right:0;height:40px;background:var(--slate-50);clip-path:ellipse(55% 100% at 50% 100%)}
#tg-277-wrapper .tg-277-hero__inner{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:18px}
#tg-277-wrapper .tg-277-hero__badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.18)!important;color:#fff!important;font-size:0.82rem;font-weight:700;padding:6px 16px;border-radius:20px;border:1px solid rgba(255,255,255,0.25)}
#tg-277-wrapper .tg-277-hero__icon-flow{display:flex;align-items:center;gap:14px}
#tg-277-wrapper .tg-277-hero__icon-box{display:flex;align-items:center;justify-content:center;width:60px;height:60px;background:rgba(255,255,255,0.12)!important;border:2px solid rgba(255,255,255,0.28);border-radius:14px;font-size:1.8rem;color:#fff!important}
#tg-277-wrapper .tg-277-hero__icon-box--mid{background:rgba(45,212,191,0.25)!important;border-color:rgba(45,212,191,0.45)}
#tg-277-wrapper .tg-277-hero__icon-box--glow{background:rgba(255,255,255,0.22)!important;border-color:rgba(255,255,255,0.45);animation:tg277-pulse 2.5s ease-in-out infinite}
@keyframes tg277-pulse{0%,100%{box-shadow:0 0 0 0 rgba(45,212,191,0.3)}50%{box-shadow:0 0 0 14px rgba(45,212,191,0)}}
#tg-277-wrapper .tg-277-hero__flow-arrow{color:rgba(255,255,255,0.45)!important;font-size:1.1rem}
#tg-277-wrapper .tg-277-hero__title{font-size:1.6rem;font-weight:900;color:#fff!important;line-height:1.35;word-break:keep-all}
#tg-277-wrapper .tg-277-hero__subtitle{font-size:0.97rem;color:rgba(255,255,255,0.88)!important;word-break:keep-all;max-width:700px;margin-bottom:0!important}
#tg-277-wrapper .tg-277-hero__tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
#tg-277-wrapper .tg-277-hero__tag{background:rgba(255,255,255,0.12)!important;color:rgba(255,255,255,0.92)!important;font-size:0.82rem;font-weight:600;padding:4px 13px;border-radius:20px;border:1px solid rgba(255,255,255,0.2)}

/* ══════ 메인 ══════ */
#tg-277-wrapper .tg-277-main{background:#fff;padding:48px 20px 40px;display:flex;flex-direction:column;gap:44px}

/* ══════ 도입부 ══════ */
#tg-277-wrapper .tg-277-intro{background:var(--slate-50)!important;border:1px solid var(--slate-200);border-radius:var(--border-r);padding:28px 24px;text-align:left}
#tg-277-wrapper .tg-277-intro__icon{margin-bottom:12px;font-size:2rem;color:var(--teal-500);text-align:center}
#tg-277-wrapper .tg-277-intro__heading{font-size:1.15rem;font-weight:800;color:var(--teal-600)!important;margin-bottom:14px;text-align:center}
#tg-277-wrapper .tg-277-intro p{font-size:0.97rem;color:var(--text-sub)!important;word-break:keep-all}
#tg-277-wrapper .tg-277-intro p strong{color:var(--teal-700)!important}

/* ══════ 섹션 공통 ══════ */
#tg-277-wrapper .tg-277-section__label{display:inline-flex;align-items:center;gap:7px;background:var(--teal-600)!important;color:#fff!important;font-size:0.78rem;font-weight:700;padding:4px 14px;border-radius:20px;margin-bottom:12px}
#tg-277-wrapper .tg-277-section__label--demo{background:var(--cyan-600)!important}
#tg-277-wrapper .tg-277-section__label--tips{background:var(--amber-600)!important}
#tg-277-wrapper .tg-277-section__title{font-size:1.25rem;font-weight:900;color:var(--slate-800)!important;border-left:4px solid var(--teal-500);padding-left:14px;margin-bottom:18px;line-height:1.4;word-break:keep-all}
#tg-277-wrapper .tg-277-section p{font-size:0.97rem;color:var(--text-sub)!important;word-break:keep-all;text-align:left}
#tg-277-wrapper .tg-277-section p strong{color:var(--teal-700)!important;font-weight:700}

/* ══════ 기능 카드 ══════ */
#tg-277-wrapper .tg-277-feature-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-top:22px}
#tg-277-wrapper .tg-277-feature-card{position:relative;background:var(--slate-50)!important;border:1px solid var(--slate-200);border-radius:12px;padding:20px 16px 18px;display:flex;flex-direction:column;gap:8px;text-align:left;transition:transform 0.25s ease,box-shadow 0.25s ease}
#tg-277-wrapper .tg-277-feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-teal)}
#tg-277-wrapper .tg-277-feature-card__num{position:absolute;top:-8px;right:14px;width:26px;height:26px;background:var(--teal-600)!important;color:#fff!important;font-size:0.75rem;font-weight:900;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}
#tg-277-wrapper .tg-277-feature-card__icon{font-size:1.5rem;color:var(--teal-500);margin-bottom:4px}
#tg-277-wrapper .tg-277-feature-card strong{font-size:0.95rem;font-weight:800;color:var(--slate-800)!important}
#tg-277-wrapper .tg-277-feature-card p{font-size:0.88rem;color:var(--text-sub)!important;margin-bottom:0!important}
#tg-277-wrapper .tg-277-feature-card p strong{color:var(--teal-600)!important}

/* ══════ 채널 발견 시뮬 ══════ */
#tg-277-wrapper .tg-277-channel-sim{margin-top:20px;max-width:380px;margin-left:auto;margin-right:auto;position:relative}

/* 채널 헤더 */
#tg-277-wrapper .tg-277-channel-sim__header{display:flex;align-items:center;gap:10px;background:linear-gradient(135deg,#f0fdfa,#ccfbf1)!important;border:1px solid #99f6e4;border-radius:12px 12px 0 0;padding:14px 16px}
#tg-277-wrapper .tg-277-channel-sim__avatar{width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:rgba(20,184,166,0.15)!important;border-radius:50%;font-size:1.4rem;flex-shrink:0}
#tg-277-wrapper .tg-277-channel-sim__name{font-size:0.92rem;font-weight:800;color:var(--slate-800)!important;display:block}
#tg-277-wrapper .tg-277-channel-sim__subs{font-size:0.7rem;font-weight:600;color:var(--text-sub)!important}

/* 메시지 */
#tg-277-wrapper .tg-277-channel-sim__msg{background:#fff!important;border-left:1px solid #99f6e4;border-right:1px solid #99f6e4;padding:14px 16px}
#tg-277-wrapper .tg-277-channel-sim__msg p{font-size:0.85rem;color:var(--text-sub)!important;margin-bottom:0!important}

/* 가입 버튼 */
#tg-277-wrapper .tg-277-channel-sim__join-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:13px;background:linear-gradient(135deg,var(--teal-500),var(--teal-600))!important;color:#fff!important;font-family:inherit;font-size:0.92rem;font-weight:800;border-radius:0 0 12px 12px;cursor:pointer;transition:transform 0.2s,box-shadow 0.2s}
#tg-277-wrapper .tg-277-channel-sim__join-btn:hover{box-shadow:0 4px 16px rgba(20,184,166,0.3)}
#tg-277-wrapper .tg-277-channel-sim__join-btn.is-joined{background:var(--slate-300)!important;color:var(--text-sub)!important;cursor:default}

/* 비슷한 채널 팝업 */
#tg-277-wrapper .tg-277-channel-sim__similar-popup{position:absolute;bottom:0;left:0;right:0;background:#fff!important;border:1px solid var(--slate-200);border-radius:14px 14px 0 0;box-shadow:0 -8px 32px rgba(0,0,0,0.12);transform:translateY(100%);opacity:0;pointer-events:none;transition:transform 0.45s cubic-bezier(0.22,1,0.36,1),opacity 0.35s ease;z-index:10}
#tg-277-wrapper .tg-277-channel-sim__similar-popup.is-visible{transform:translateY(0);opacity:1;pointer-events:auto;position:relative}
#tg-277-wrapper .tg-277-channel-sim__popup-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--slate-200)}
#tg-277-wrapper .tg-277-channel-sim__popup-title{font-size:0.88rem;font-weight:800;color:var(--teal-700)!important;display:flex;align-items:center;gap:6px}
#tg-277-wrapper .tg-277-channel-sim__popup-title i{color:var(--teal-500)}
#tg-277-wrapper .tg-277-channel-sim__popup-close{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:var(--slate-100)!important;border-radius:50%;font-size:0.7rem;color:var(--slate-500)!important;cursor:pointer;font-family:inherit}

/* 스크롤 영역 */
#tg-277-wrapper .tg-277-channel-sim__scroll-area{display:flex;gap:8px;overflow-x:auto;padding:14px 16px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
#tg-277-wrapper .tg-277-channel-sim__scroll-area::-webkit-scrollbar{height:4px}
#tg-277-wrapper .tg-277-channel-sim__scroll-area::-webkit-scrollbar-track{background:transparent}
#tg-277-wrapper .tg-277-channel-sim__scroll-area::-webkit-scrollbar-thumb{background:var(--teal-400);border-radius:2px}

/* 유사 채널 카드 */
#tg-277-wrapper .tg-277-channel-sim__similar-card{flex-shrink:0;width:100px;display:flex;flex-direction:column;align-items:center;gap:5px;background:var(--slate-50)!important;border:1px solid var(--slate-200);border-radius:10px;padding:10px 6px;scroll-snap-align:start;transition:border-color 0.2s,box-shadow 0.2s}
#tg-277-wrapper .tg-277-channel-sim__similar-card:hover{border-color:var(--teal-400);box-shadow:var(--shadow-teal)}
#tg-277-wrapper .tg-277-channel-sim__sim-avatar{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:rgba(20,184,166,0.1)!important;border-radius:50%;font-size:1.1rem}
#tg-277-wrapper .tg-277-channel-sim__similar-card strong{font-size:0.62rem;font-weight:800;color:var(--slate-800)!important;text-align:center;line-height:1.2;max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#tg-277-wrapper .tg-277-channel-sim__similar-card span{font-size:0.55rem;font-weight:600;color:var(--slate-400)!important}
#tg-277-wrapper .tg-277-channel-sim__sim-join{padding:4px 10px;background:var(--teal-500)!important;color:#fff!important;font-family:inherit;font-size:0.6rem;font-weight:700;border-radius:6px;cursor:pointer;transition:background 0.2s}
#tg-277-wrapper .tg-277-channel-sim__sim-join:hover{background:var(--teal-600)!important}
#tg-277-wrapper .tg-277-channel-sim__sim-join.is-joined{background:var(--slate-300)!important;color:var(--text-sub)!important;cursor:default}

/* 가입 토스트 메시지 */
#tg-277-wrapper .tg-277-channel-sim__joined-msg{display:none;align-items:center;justify-content:center;gap:6px;padding:10px;background:linear-gradient(135deg,#f0fdfa,#ccfbf1)!important;border:1px solid #99f6e4;border-radius:10px;margin-top:8px;font-size:0.78rem;font-weight:700;color:var(--teal-700)!important;animation:tg277-fadeIn 0.35s ease}
@keyframes tg277-fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
#tg-277-wrapper .tg-277-channel-sim__joined-msg.is-visible{display:flex}
#tg-277-wrapper .tg-277-channel-sim__joined-msg i{color:var(--teal-500)}

/* ══════ 탭 전환 ══════ */
#tg-277-wrapper .tg-277-tab-group{display:flex;gap:0;margin-top:22px;border-radius:12px 12px 0 0;overflow:hidden;border:1px solid var(--slate-200);border-bottom:none}
#tg-277-wrapper .tg-277-tab-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:14px 12px;background:var(--slate-100)!important;color:var(--text-sub)!important;font-family:inherit;font-size:0.88rem;font-weight:700;cursor:pointer;transition:background 0.25s ease;border-right:1px solid var(--slate-200)}
#tg-277-wrapper .tg-277-tab-btn:last-child{border-right:none}
#tg-277-wrapper .tg-277-tab-btn:hover{background:var(--slate-200)!important}
#tg-277-wrapper .tg-277-tab-btn--active{background:var(--teal-600)!important;color:#fff!important}
#tg-277-wrapper .tg-277-tab-btn i{font-size:1.1rem}
#tg-277-wrapper .tg-277-tab-panel{display:none;background:var(--slate-50)!important;border:1px solid var(--slate-200);border-top:3px solid var(--teal-500);border-radius:0 0 var(--border-r) var(--border-r);padding:22px 20px;text-align:left;animation:tg277-fadeIn 0.35s ease}
#tg-277-wrapper .tg-277-tab-panel--active{display:block}
#tg-277-wrapper .tg-277-tab-panel__header{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}
#tg-277-wrapper .tg-277-tab-panel__icon-wrap{display:flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:12px;flex-shrink:0;font-size:1.6rem;color:#fff!important}
#tg-277-wrapper .tg-277-tab-panel__icon-wrap--pc{background:linear-gradient(135deg,#2283dd,#005bb5)!important}
#tg-277-wrapper .tg-277-tab-panel__icon-wrap--android{background:linear-gradient(135deg,#22c55e,#15803d)!important}
#tg-277-wrapper .tg-277-tab-panel__icon-wrap--ios{background:linear-gradient(135deg,#64748b,#334155)!important}
#tg-277-wrapper .tg-277-tab-panel__title{font-size:1.05rem;font-weight:800;color:var(--slate-800)!important;margin-bottom:4px}
#tg-277-wrapper .tg-277-tab-panel__desc{font-size:0.88rem;color:var(--text-sub)!important;margin-bottom:0!important}

/* ══════ 단계 ══════ */
#tg-277-wrapper .tg-277-steps{counter-reset:step277;display:flex;flex-direction:column;gap:9px;margin-bottom:14px;text-align:left}
#tg-277-wrapper .tg-277-steps__item{counter-increment:step277;position:relative;padding-left:32px;font-size:0.9rem;color:var(--text-sub)!important;line-height:1.55}
#tg-277-wrapper .tg-277-steps__item::before{content:counter(step277);position:absolute;left:0;top:2px;width:22px;height:22px;background:var(--teal-600)!important;color:#fff!important;font-size:0.7rem;font-weight:900;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}
#tg-277-wrapper .tg-277-steps__item strong{color:var(--teal-700)!important;font-weight:700}
#tg-277-wrapper .tg-277-key-action{background:linear-gradient(135deg,#f0fdfa,#ccfbf1)!important;border:1px solid #99f6e4;border-radius:10px;padding:12px 16px;font-size:0.88rem;color:var(--text-main)!important;display:flex;align-items:center;gap:8px;text-align:left}
#tg-277-wrapper .tg-277-key-action>i{color:var(--teal-600)!important;flex-shrink:0}
#tg-277-wrapper .tg-277-key-action strong{color:var(--teal-800)!important;font-weight:800;margin-right:4px}

/* ══════ 아코디언 ══════ */
#tg-277-wrapper .tg-277-accordion{display:flex;flex-direction:column;gap:12px;margin-top:20px}
#tg-277-wrapper .tg-277-accordion__item{background:var(--slate-50)!important;border:1px solid var(--slate-200);border-radius:var(--border-r);overflow:hidden;transition:border-color 0.3s ease,box-shadow 0.3s ease}
#tg-277-wrapper .tg-277-accordion__item.is-open{border-color:var(--teal-400);box-shadow:var(--shadow-teal)}
#tg-277-wrapper .tg-277-accordion__header{display:flex;align-items:center;gap:10px;padding:16px 18px;width:100%;background:none!important;cursor:pointer;font-family:inherit;text-align:left}
#tg-277-wrapper .tg-277-accordion__icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;background:linear-gradient(135deg,#f0fdfa,#ccfbf1)!important;border-radius:10px;font-size:1.1rem;color:var(--teal-600)!important;flex-shrink:0}
#tg-277-wrapper .tg-277-accordion__title{flex:1;font-size:0.95rem;font-weight:800;color:var(--slate-800)!important}
#tg-277-wrapper .tg-277-accordion__arrow{color:var(--slate-400)!important;font-size:0.8rem;transition:transform 0.3s ease;flex-shrink:0}
#tg-277-wrapper .tg-277-accordion__item.is-open .tg-277-accordion__arrow{transform:rotate(180deg)}
#tg-277-wrapper .tg-277-accordion__body{max-height:0;overflow:hidden;transition:max-height 0.45s ease,padding 0.45s ease;padding:0 18px;text-align:left}
#tg-277-wrapper .tg-277-accordion__item.is-open .tg-277-accordion__body{max-height:600px;padding:0 18px 20px}
#tg-277-wrapper .tg-277-accordion__body p{font-size:0.9rem;color:var(--text-sub)!important}
#tg-277-wrapper .tg-277-accordion__body p strong{color:var(--teal-600)!important}

/* ══════ 결론 ══════ */
#tg-277-wrapper .tg-277-summary{background:linear-gradient(150deg,var(--slate-900) 0%,#134e4a 100%)!important;border-radius:var(--border-r);padding:44px 24px;text-align:center}
#tg-277-wrapper .tg-277-summary__title{font-size:1.3rem;font-weight:900;color:#fff!important;margin-bottom:30px;display:flex;align-items:center;justify-content:center;gap:10px}
#tg-277-wrapper .tg-277-summary__flow{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;margin-bottom:36px}
#tg-277-wrapper .tg-277-summary__flow-item{display:flex;flex-direction:column;align-items:center;gap:8px}
#tg-277-wrapper .tg-277-summary__flow-icon{display:flex;align-items:center;justify-content:center;width:52px;height:52px;background:rgba(255,255,255,0.1)!important;border:2px solid rgba(255,255,255,0.18);border-radius:12px;font-size:1.3rem;color:#fff!important}
#tg-277-wrapper .tg-277-summary__flow-item span{font-size:0.72rem;font-weight:600;color:var(--slate-300)!important;max-width:80px;text-align:center;line-height:1.3}
#tg-277-wrapper .tg-277-summary__flow-arrow{color:rgba(255,255,255,0.3)!important;font-size:0.9rem}
#tg-277-wrapper .tg-277-summary__checklist{text-align:left;max-width:640px;margin:0 auto 28px;display:flex;flex-direction:column;gap:10px}
#tg-277-wrapper .tg-277-summary__checklist li{font-size:0.93rem;color:var(--slate-300)!important;display:flex;align-items:flex-start;gap:8px;line-height:1.6}
#tg-277-wrapper .tg-277-summary__checklist li i{color:var(--teal-400)!important;flex-shrink:0;margin-top:4px}
#tg-277-wrapper .tg-277-summary__checklist li strong{color:#fff!important;font-weight:700}
#tg-277-wrapper .tg-277-summary__desc{font-size:0.92rem;color:var(--slate-300)!important;word-break:keep-all;max-width:700px;margin:0 auto!important}
#tg-277-wrapper .tg-277-summary__desc strong{color:#fff!important}
#tg-277-wrapper .tg-277-footer{margin-top:28px}
#tg-277-wrapper .tg-277-footer__btn{display:inline-flex;align-items:center;gap:8px;background:#fff!important;color:var(--teal-700)!important;font-size:0.92rem;font-weight:800;padding:13px 30px;border-radius:30px;box-shadow:0 4px 16px rgba(0,0,0,0.2);transition:transform 0.22s ease,box-shadow 0.22s ease}
#tg-277-wrapper .tg-277-footer__btn:hover{transform:scale(1.05);box-shadow:0 6px 22px rgba(0,0,0,0.25)}

/* ══════ 스크롤 등장 ══════ */
#tg-277-wrapper .tg-277-motion{opacity:0;transform:translateY(26px);transition:opacity 0.65s ease-out,transform 0.65s ease-out}
#tg-277-wrapper .tg-277-motion.is-visible{opacity:1;transform:translateY(0)}

/* ══════ 반응형 ══════ */
@media(min-width:640px){
    #tg-277-wrapper .tg-277-hero{padding:64px 40px 60px}
    #tg-277-wrapper .tg-277-hero__title{font-size:2rem}
    #tg-277-wrapper .tg-277-main{padding:56px 40px 48px;gap:52px}
    #tg-277-wrapper .tg-277-feature-grid{grid-template-columns:repeat(2,1fr)}
    #tg-277-wrapper .tg-277-summary{padding:56px 40px}
    #tg-277-wrapper .tg-277-tab-panel__header{align-items:center}
}
@media(min-width:900px){
    #tg-277-wrapper .tg-277-hero__title{font-size:2.3rem}
    #tg-277-wrapper .tg-277-section__title{font-size:1.4rem}
}
