/* FitMatrix AI 24h v5.0.0 - Imperial Standard System */
:root {
    --bg-dark: #090d16;
    --card-bg: #131b2e;
    --accent-cyan: #06b6d4;
    --accent-gold: #fee500;
    --accent-red: #ef4444;
    --text-light: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Outfit', 'Noto Sans KR', sans-serif; }
body { background-color: var(--bg-dark); color: var(--text-light); min-height: 100vh; display: flex; flex-direction: column; }

/* HEADER */
.app-header { background: #0f172a; border-bottom: 1px solid var(--border-color); padding: 16px 24px; }
.header-container { max-width: 1280px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.status-badge { background: rgba(6, 182, 212, 0.2); color: var(--accent-cyan); font-size: 0.75rem; font-weight: 800; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--accent-cyan); }
.logo-area h1 { font-size: 1.5rem; font-weight: 900; color: #fff; margin-top: 4px; }
.logo-area p { font-size: 0.85rem; color: var(--text-muted); }
.header-controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* MANDATORY THREE BUTTON SYSTEM */
.mandatory-three-btn-group { display: flex; gap: 6px; }
.mandatory-btn { border: 1px solid var(--border-color); padding: 8px 12px; border-radius: 8px; font-weight: 800; font-size: 0.85rem; cursor: pointer; display: flex; align-items: center; gap: 4px; transition: 0.2s; }
.mandatory-btn.share { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border-color: #3b82f6; }
.mandatory-btn.guide { background: rgba(254, 229, 0, 0.15); color: var(--accent-gold); border-color: var(--accent-gold); }
.mandatory-btn.sponsor { background: rgba(239, 68, 68, 0.15); color: #f87171; border-color: #ef4444; }
.mandatory-btn:hover { opacity: 0.85; transform: translateY(-1px); }

.lang-selector-pill select { background: #1e293b; color: #fff; border: 1px solid var(--border-color); padding: 8px 10px; border-radius: 8px; font-weight: 700; cursor: pointer; }
.lang-selector-pill select option { background-color: #0f172a !important; color: #ffffff !important; }
.app-store-btn { background: linear-gradient(135deg, #06b6d4, #3b82f6); color: #fff; text-decoration: none; padding: 8px 14px; border-radius: 8px; font-weight: 700; font-size: 0.85rem; }

/* NAVIGATION TABS */
.app-nav { background: #0f172a; border-bottom: 1px solid var(--border-color); display: flex; gap: 8px; padding: 10px 24px; overflow-x: auto; max-width: 1280px; margin: 0 auto; width: 100%; }
.nav-tab { background: transparent; color: var(--text-muted); border: 1px solid transparent; padding: 10px 16px; border-radius: 8px; font-weight: 700; font-size: 0.9rem; cursor: pointer; white-space: nowrap; transition: 0.2s; }
.nav-tab:hover { color: #fff; background: rgba(255, 255, 255, 0.05); }
.nav-tab.active { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); border-color: var(--accent-cyan); }

/* MAIN CONTENT & PANELS */
.main-content { max-width: 1280px; margin: 24px auto; padding: 0 24px; flex: 1; width: 100%; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.workout-dashboard { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 900px) { .workout-dashboard { grid-template-columns: 1fr; } }

.workout-logger-panel, .muscle-heatmap-panel, .music-section-container, .swap-section-container, .chart-section-container, .timer-section-container {
    background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 24px;
}

h3 { font-size: 1.25rem; font-weight: 800; color: #fff; margin-bottom: 12px; }
.panel-sub { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 20px; }

.exercise-selector-box { margin-bottom: 20px; }
.exercise-selector-box label { display: block; font-size: 0.9rem; font-weight: 700; color: var(--accent-gold); margin-bottom: 6px; }
.exercise-selector-box select { width: 100%; background: #0f172a; color: #fff; border: 1px solid var(--border-color); padding: 12px; border-radius: 10px; font-size: 1rem; font-weight: 700; }
.exercise-selector-box select option { background-color: #0f172a !important; color: #ffffff !important; }

.quick-set-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.input-card { background: #0f172a; border: 1px solid var(--border-color); border-radius: 12px; padding: 14px; text-align: center; }
.input-card label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 4px; }
.input-card input { width: 100%; background: transparent; border: none; color: #fff; font-size: 1.8rem; font-weight: 900; text-align: center; margin-bottom: 8px; }
.step-btns { display: flex; gap: 6px; justify-content: center; }
.step-btns button { background: #1e293b; color: #fff; border: none; padding: 4px 12px; border-radius: 6px; font-weight: 700; cursor: pointer; }

.btn-primary-big { width: 100%; background: linear-gradient(135deg, #06b6d4, #3b82f6); color: #fff; border: none; padding: 16px; border-radius: 12px; font-size: 1.05rem; font-weight: 800; cursor: pointer; box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4); }

.inline-timer-box { background: rgba(254, 229, 0, 0.1); border: 1px solid var(--accent-gold); border-radius: 10px; padding: 12px; margin-top: 14px; display: flex; align-items: center; justify-content: space-between; }
.inline-timer-box strong { color: var(--accent-gold); font-size: 1.2rem; font-weight: 900; }
.btn-cancel-timer { background: #334155; color: #fff; border: none; padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; cursor: pointer; }

.today-volume-card { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; background: #0f172a; border: 1px solid var(--border-color); border-radius: 12px; padding: 16px; margin-top: 20px; }
.vol-stat { text-align: center; }
.vol-stat span { display: block; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; }
.vol-stat strong { font-size: 1.1rem; color: var(--accent-gold); font-weight: 800; }

.btn-sample-try { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); border: 1px solid var(--accent-cyan); font-weight: 800; padding: 8px 16px; border-radius: 8px; cursor: pointer; }

/* CANVAS VIEWPORT */
.canvas-viewport { text-align: center; margin-bottom: 20px; background: #0f172a; border-radius: 12px; padding: 12px; }
#muscle-canvas { max-width: 100%; height: auto; border-radius: 8px; }

.muscle-stats-grid { display: flex; flex-direction: column; gap: 10px; }
.m-bar-item { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; }
.m-bar-item span { width: 120px; color: var(--text-muted); font-weight: 600; }
.progress-track { flex: 1; background: #0f172a; height: 10px; border-radius: 6px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, #06b6d4, #ef4444); transition: width 0.3s; }
.m-bar-item strong { width: 45px; text-align: right; color: var(--accent-cyan); font-weight: 800; }

/* MUSIC PLAYER SECTION */
.native-audio-card, .external-music-card { background: #0f172a; border: 1px solid var(--border-color); border-radius: 16px; padding: 24px; margin-bottom: 24px; }
.native-audio-card h4, .external-music-card h4 { font-size: 1.1rem; font-weight: 800; color: var(--accent-gold); margin-bottom: 16px; }

.audio-beat-selector { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 20px; }
@media (max-width: 600px) { .audio-beat-selector { grid-template-columns: 1fr; } }

.m-beat-btn { background: #131b2e; color: #fff; border: 1px solid var(--border-color); padding: 14px; border-radius: 10px; font-size: 0.95rem; font-weight: 800; cursor: pointer; text-align: left; transition: 0.2s; }
.m-beat-btn.active { background: rgba(6, 182, 212, 0.2); border-color: var(--accent-cyan); color: var(--accent-cyan); }

.audio-player-status { background: #1e293b; border-radius: 12px; padding: 16px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.audio-pulse-ring { width: 16px; height: 16px; border-radius: 50%; background: var(--accent-cyan); box-shadow: 0 0 10px var(--accent-cyan); animation: pulse 1s infinite alternate; }
@keyframes pulse { 0% { transform: scale(0.8); opacity: 0.6; } 100% { transform: scale(1.2); opacity: 1; } }

#audio-beat-title { flex: 1; font-weight: 700; font-size: 0.95rem; color: #fff; }
.btn-play { background: linear-gradient(135deg, #06b6d4, #3b82f6); color: #fff; border: none; padding: 10px 18px; border-radius: 8px; font-weight: 800; cursor: pointer; }

.launch-btns-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .launch-btns-grid { grid-template-columns: 1fr; } }
.launch-btn { display: block; text-align: center; text-decoration: none; padding: 16px; border-radius: 12px; font-weight: 800; font-size: 0.95rem; color: #fff; }
.launch-btn.yt { background: #ef4444; }
.launch-btn.sp { background: #10b981; }

.swap-cards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
@media (max-width: 600px) { .swap-cards-grid { grid-template-columns: 1fr; } }
.swap-card { background: #0f172a; border: 1px solid var(--border-color); border-radius: 12px; padding: 16px; }
.swap-card h4 { color: var(--accent-gold); font-size: 1rem; margin-bottom: 6px; }
.swap-card p { font-size: 0.85rem; color: var(--text-muted); }

.pr-banner-card { background: #0f172a; border: 1px solid var(--accent-gold); border-radius: 12px; padding: 20px; }
.pr-banner-card h4 { color: var(--accent-gold); margin-bottom: 12px; }
.pr-item { font-size: 1rem; color: #fff; }

.rest-timer-card { background: #0f172a; border-radius: 12px; padding: 20px; text-align: center; }
.timer-display { font-size: 3rem; font-weight: 900; color: var(--accent-cyan); margin: 16px 0; }
.timer-controls { display: flex; gap: 10px; justify-content: center; }
.timer-controls button { background: #1e293b; color: #fff; border: 1px solid var(--border-color); padding: 8px 16px; border-radius: 8px; font-weight: 700; cursor: pointer; }

/* MODAL */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.8); z-index: 9999; justify-content: center; align-items: center; padding: 20px; }
.modal-overlay.active { display: flex; }
.modal-content { background: #131b2e; border: 1px solid var(--accent-gold); border-radius: 16px; max-width: 500px; width: 100%; padding: 24px; position: relative; }
.modal-close-btn { position: absolute; top: 16px; right: 16px; background: transparent; border: none; color: #fff; font-size: 1.2rem; cursor: pointer; }

/* FOOTER */
.app-footer { background: #0f172a; border-top: 1px solid var(--border-color); text-align: center; padding: 20px; font-size: 0.8rem; color: var(--text-muted); margin-top: auto; }

/* OFFICIAL IMPERIAL SPONSOR STANDARD MODAL STYLING */
.sponsor-modal-box { max-width: 540px; }
.bible-verse-text { background: rgba(254, 229, 0, 0.1); border-left: 3px solid var(--accent-gold); padding: 10px 14px; font-style: italic; font-size: 0.9rem; color: var(--accent-gold); margin: 12px 0; border-radius: 4px; }
.donate-intro-text { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.5; }

.bank-card-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.bank-card-item { background: #0f172a; border: 1px solid var(--border-color); border-radius: 10px; padding: 12px; display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 0.85rem; font-weight: 700; color: #fff; }
.bank-card-item button { background: #334155; color: #fff; border: none; padding: 4px 10px; border-radius: 6px; font-size: 0.8rem; cursor: pointer; white-space: nowrap; }

.pro-license-box { background: rgba(6, 182, 212, 0.1); border: 1px solid var(--accent-cyan); border-radius: 12px; padding: 14px; }
.pro-license-box label { font-size: 0.85rem; font-weight: 800; color: var(--accent-cyan); display: block; margin-bottom: 8px; }
.lic-input-row { display: flex; gap: 8px; }
.lic-input-row input { flex: 1; background: #0f172a; border: 1px solid var(--border-color); border-radius: 8px; color: #fff; padding: 8px 12px; font-weight: 700; }
.lic-input-row button { background: linear-gradient(135deg, #06b6d4, #3b82f6); color: #fff; border: none; padding: 8px 14px; border-radius: 8px; font-weight: 800; cursor: pointer; white-space: nowrap; }