/**
 * 나나채팅 — 나나뮤직 브랜드 톤 오버레이
 * 기존 id/DOM·JS 바인딩 유지, 시각 스타일만 보강
 */

:root {
    --nana-chat-purple: #a855f7;
    --nana-chat-purple-deep: #7c3aed;
    --nana-chat-purple-dark: #1a0f2e;
    --nana-chat-bg: linear-gradient(135deg, #0f0a15 0%, #1a0f2e 48%, #12081c 100%);
    --nana-chat-card: rgba(22, 14, 36, 0.82);
    --nana-chat-card-border: rgba(168, 85, 247, 0.28);
    --nana-chat-glow: 0 0 40px rgba(168, 85, 247, 0.22);
    --nana-chat-text: #f5f3ff;
    --nana-chat-text-muted: rgba(237, 233, 254, 0.78);
}

/* ── 첫 화면 ── */
#opening-screen {
    background: var(--nana-chat-bg);
    background-size: 200% 200%;
}

#opening-screen::before {
    width: min(72vw, 320px);
    height: min(72vw, 320px);
    background: radial-gradient(circle, rgba(168, 85, 247, 0.45) 0%, transparent 70%);
    filter: blur(72px);
    pointer-events: none;
}

.opening-content.opening-card {
    max-width: 400px;
    padding: 28px 24px 32px;
    padding-top: max(28px, calc(16px + env(safe-area-inset-top, 0px)));
    border-radius: 28px;
    background: var(--nana-chat-card);
    border: 1px solid var(--nana-chat-card-border);
    box-shadow: var(--nana-chat-glow), 0 24px 56px rgba(0, 0, 0, 0.35);
    position: relative;
    z-index: 1;
}

.main-logo-style {
    font-size: clamp(42px, 11vw, 56px);
    color: var(--nana-chat-text);
    text-shadow: none;
    letter-spacing: -2.8px;
}

.opening-subtext {
    color: var(--nana-chat-text-muted);
    font-size: clamp(17px, 4.5vw, 22px);
    margin: 12px 0 24px;
}

.opening-btn-primary {
    width: 100%;
    max-width: 100%;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    box-shadow: 0 12px 28px rgba(124, 58, 237, 0.42);
    font-size: 17px;
}

.opening-btn-secondary {
    width: 100%;
    max-width: 100%;
    height: 52px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(168, 85, 247, 0.35);
    color: var(--nana-chat-text);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.opening-btn-row {
    gap: 12px;
    margin-top: 8px;
}

/* ── onboarding ── */
#setup-screen {
    background: var(--nana-chat-bg);
    background-size: 200% 200%;
    padding: max(20px, env(safe-area-inset-top, 0px)) 20px max(20px, env(safe-area-inset-bottom, 0px));
}

.setup-content-wrapper {
    max-width: 400px;
    padding: 22px 20px 28px;
    border-radius: 28px;
    background: var(--nana-chat-card);
    border: 1px solid var(--nana-chat-card-border);
    box-shadow: var(--nana-chat-glow), 0 20px 48px rgba(0, 0, 0, 0.32);
}

.setup-back-btn {
    background: rgba(168, 85, 247, 0.14);
    border: 1px solid rgba(168, 85, 247, 0.32);
    color: var(--nana-chat-text);
    min-height: 44px;
}

.step-title {
    font-size: clamp(24px, 6vw, 30px);
    color: var(--nana-chat-text);
    text-shadow: none;
    margin-bottom: 20px;
}

.modern-input {
    border-radius: 16px;
    border: 1px solid rgba(168, 85, 247, 0.25);
    background: rgba(255, 255, 255, 0.96);
}

.option-btn {
    border-radius: 16px;
    border: 1px solid rgba(168, 85, 247, 0.2);
}

.option-btn.option-btn--selected {
    border-color: var(--nana-chat-purple);
    box-shadow: 0 0 0 2px rgba(168, 85, 247, 0.35);
}

.btn-next-circle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fff, #f3e8ff);
    color: var(--nana-chat-purple-deep);
}

.btn-match-start {
    width: 100%;
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    color: #fff;
    padding: 18px 20px;
    border-radius: 16px;
    font-size: 20px;
    font-weight: 900;
    border: none;
    box-shadow: 0 12px 28px rgba(124, 58, 237, 0.38);
    min-height: 56px;
    touch-action: manipulation;
}

/* ── 채팅방 ── */
#chat-screen {
    background: linear-gradient(180deg, #12081c 0%, #1a0f2e 42%, #221433 100%);
}

/* 상대 typing indicator — 모바일/데스크톱 공통 표시 */
#typing-loader {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    flex-shrink: 0;
    visibility: visible;
    opacity: 1;
    pointer-events: none;
}

#typing-loader .typing-bubble {
    display: flex;
    align-items: center;
    min-height: 36px;
}

#chat-box {
    background:
        radial-gradient(ellipse at 20% 0%, rgba(168, 85, 247, 0.12), transparent 45%),
        linear-gradient(180deg, #140a1f 0%, #1e1030 100%);
}

.stats-bar {
    background: rgba(15, 10, 21, 0.88);
    border-bottom: 1px solid rgba(168, 85, 247, 0.2);
    color: var(--nana-chat-text-muted);
}

.stats-bar span {
    color: #ede9fe;
}

.top-bar {
    background: rgba(15, 10, 21, 0.94);
    border-bottom: 1px solid rgba(168, 85, 247, 0.22);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: var(--nana-chat-text);
}

.top-title {
    color: #ede9fe;
    font-weight: 800;
}

.chat-top-actions {
    position: absolute;
    left: 10px;
    display: flex;
    gap: 6px;
    align-items: center;
}

.chat-action-btn,
.top-exit-btn {
    min-height: 36px;
    padding: 6px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 13px;
    font-weight: 700;
    background: transparent;
    touch-action: manipulation;
}

.chat-action-btn--report {
    color: #fbbf24;
    border-color: rgba(251, 191, 36, 0.35);
    background: rgba(251, 191, 36, 0.1);
}

.chat-action-btn--block {
    color: #f87171;
    border-color: rgba(248, 113, 113, 0.35);
    background: rgba(248, 113, 113, 0.1);
}

.top-exit-btn {
    color: var(--nana-chat-text-muted);
    border-color: rgba(168, 85, 247, 0.28);
    background: rgba(168, 85, 247, 0.1);
}

.top-bar button:active,
.chat-action-btn:active,
.top-exit-btn:active {
    opacity: 0.85;
    transform: scale(0.97);
}

.msg-line.me .bubble {
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.28);
    font-size: 15px;
    line-height: 1.45;
}

.msg-line.partner .bubble {
    background: linear-gradient(135deg, #3b2668, #2a3f7a);
    font-size: 15px;
    line-height: 1.45;
}

.msg-line.me.msg-pending .bubble {
    opacity: 0.82;
}

.system {
    background: rgba(22, 14, 36, 0.88);
    border: 1px solid rgba(168, 85, 247, 0.22);
    color: #d8b4fe;
    backdrop-filter: none;
}

.input-area {
    background: rgba(15, 10, 21, 0.95);
    border-top: 1px solid rgba(168, 85, 247, 0.22);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

#msg-input {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(168, 85, 247, 0.2);
    border-radius: 22px;
    font-size: 16px;
}

#send-btn {
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}

#next-btn {
    background: rgba(168, 85, 247, 0.18);
    color: #ede9fe;
    border: 1px solid rgba(168, 85, 247, 0.35);
    border-radius: 20px;
}

/* ── toast / confirm (뮤직 톤) ── */
.nana-chat-toast {
    background: rgba(22, 14, 36, 0.97);
    border: 1px solid rgba(168, 85, 247, 0.4);
    color: #ede9fe;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5), var(--nana-chat-glow);
}

.nana-chat-confirm__sheet {
    background: rgba(28, 18, 42, 0.98);
    border: 1px solid rgba(168, 85, 247, 0.3);
    color: #f5f3ff;
}

.nana-chat-confirm__title {
    color: #fff;
}

.nana-chat-confirm__message {
    color: var(--nana-chat-text-muted);
}

.nana-chat-confirm__btn--cancel {
    background: rgba(255, 255, 255, 0.08);
    color: #ede9fe;
    border: 1px solid rgba(168, 85, 247, 0.25);
}

.nana-chat-confirm__btn--ok {
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    color: #fff;
}

.nana-chat-confirm__btn--danger {
    background: #ef4444;
    color: #fff;
}

/* ── 랜딩 (소개) ── */
#landing-page {
    background:
        radial-gradient(circle at 50% 0%, rgba(168, 85, 247, 0.2), transparent 42%),
        var(--nana-chat-bg);
}

.landing-badge {
    border: 1px solid rgba(168, 85, 247, 0.35);
    color: #e9d5ff;
}

.landing-btn-primary {
    background: linear-gradient(135deg, var(--nana-chat-purple), var(--nana-chat-purple-deep));
    color: #fff;
}

.landing-card {
    border-color: rgba(168, 85, 247, 0.22);
    background: var(--nana-chat-card);
}

/* 데스크탑 프레임(기존 style.css)에서도 다크 헤더 유지 */
@media (min-width: 769px) {
    #chat-top-bar.top-bar {
        background: rgba(15, 10, 21, 0.94);
        border-bottom: 1px solid rgba(168, 85, 247, 0.22);
        color: #ede9fe;
    }

    #chat-top-bar .top-title {
        color: #ede9fe;
    }
}

/* ── 모바일: 타이틀 선명도 ── */
@media (max-width: 768px) {
    .opening-title-wrap,
    .main-logo-style {
        filter: none !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        text-shadow: none !important;
        transform: none !important;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    .main-logo-image {
        filter: none !important;
    }

    .opening-content.opening-card {
        width: calc(100% - 32px);
        margin: 0 auto;
    }

    .setup-content-wrapper {
        width: calc(100% - 24px);
    }

    .chat-action-btn,
    .top-exit-btn {
        min-height: 40px;
        padding: 8px 11px;
    }
}