/* ========================================
   GIEO QUẺ LỤC HÀO - STYLES
   Mobile-First Premium Dark Theme
   ======================================== */

/* --- CSS Variables --- */
:root {
    --primary-dark: #6b1a1a;
    --primary: #8b2525;
    --primary-light: #b93333;
    --accent-dark: #b45309;
    --accent: #d97706;
    --accent-light: #f59e0b;
    --bg-main: #0c1222;
    --bg-secondary: #151d30;
    --bg-card: #1a2438;
    --bg-card-hover: #243352;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #2d3a52;
    --border-light: #425173;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.6);
    --shadow-glow: 0 0 20px rgba(217,119,6,0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; overflow-x: hidden; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-main);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- App Container (Phone-like on all screens) --- */
.app-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 16px 12px;
    min-height: 100vh;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* --- Hero Section --- */
.hero-section {
    text-align: center;
    padding: 24px 0 8px;
}

.hero-icon {
    font-size: 3rem;
    margin-bottom: 4px;
    filter: drop-shadow(0 0 12px rgba(217,119,6,0.5));
}

.hero-section h1 {
    font-size: 1.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #fef3c7, var(--accent-light), #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Instructions Card --- */
.instructions-card {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
}

.instructions-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.instructions-card strong {
    color: var(--accent);
}

.instructions-card em {
    color: var(--text-primary);
    font-style: normal;
    font-weight: 600;
    background: rgba(217,119,6,0.15);
    padding: 1px 6px;
    border-radius: 4px;
}

/* --- Date Section --- */
.date-section {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px 16px;
}

.date-section label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 16px;
    font-family: inherit;
    background: var(--bg-main);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    -webkit-appearance: none;
    appearance: none;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(217,119,6,0.15);
}

/* --- Main CTA Button --- */
.btn-main-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 18px 24px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: 2px solid var(--accent-dark);
    border-radius: var(--radius-lg);
    color: var(--accent-light);
    cursor: pointer;
    font-family: inherit;
    font-size: 1.15rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: var(--shadow-glow), var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    position: relative;
    overflow: hidden;
}

.btn-main-cta::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.08), transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-main-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(217,119,6,0.5), var(--shadow-lg);
    border-color: var(--accent);
}

.btn-main-cta:hover::after { opacity: 1; }

.btn-main-cta:active {
    transform: translateY(0) scale(0.98);
}

.cta-coin-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    filter: drop-shadow(0 0 6px rgba(217,119,6,0.6));
    animation: pulse-coin 2.5s ease-in-out infinite;
}

@keyframes pulse-coin {
    0%, 100% { transform: scale(1); filter: drop-shadow(0 0 6px rgba(217,119,6,0.6)); }
    50% { transform: scale(1.1); filter: drop-shadow(0 0 14px rgba(217,119,6,0.8)); }
}

/* --- Result Section --- */
.result-section {
    display: none;
}

.result-section.visible {
    display: block;
    animation: fadeSlideUp 0.5s ease;
}

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-card {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    text-align: center;
}

.result-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
}

.image-display {
    background: white;
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 12px;
}

.image-display img {
    max-width: 100%;
    height: auto;
    display: block;
}

.save-hint {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 8px;
}

.hint-mobile { display: inline; }
.hint-desktop { display: none; }

@media (min-width: 769px) {
    .hint-mobile { display: none; }
    .hint-desktop { display: inline; }
}

.action-buttons {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.action-buttons .btn { flex: 1; margin-top: 0; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.2s;
}

.btn-icon { font-size: 1.1rem; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

.btn-download {
    background: linear-gradient(135deg, var(--accent-dark), #78350f);
    color: white;
    border: 1px solid var(--accent);
}

.btn-download:hover {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(217,119,6,0.3);
}

/* ========================================
   CAPTURE TARGET STYLES
   These styles are used for html2canvas image generation
   ======================================== */

#captureArea {
    position: absolute;
    left: -9999px;
    top: 0;
}

#captureTarget {
    width: 1000px;
    background-color: #fefee5;
    padding: 20px;
    font-family: 'Inter', sans-serif;
    font-size: 17px;
    color: #000000;
}

/* --- Capture Target Styles (Light Theme for Export Image) --- */
#captureTarget .info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fefee5;
    border-bottom: 2px solid #888;
    padding: 5px 10px;
    margin-bottom: 10px;
    min-height: 110px;
}

#captureTarget .info-content {
    flex: 1;
}

#captureTarget .info-line {
    margin-bottom: 6px;
    line-height: 1.7;
    color: #000000;
    font-size: 17px;
}

#captureTarget .info-line:last-child {
    margin-bottom: 0;
}

#captureTarget .info-line strong {
    color: #000000;
}

#captureTarget .info-icon {
    width: 110px;
    height: 110px;
    margin-left: 0;
    margin-right: -10px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

#captureTarget .info-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0.9;
}

#captureTarget .highlight {
    color: #e60000;
    font-weight: 700;
}

#captureTarget .hex-visual-section {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 40px;
    padding: 20px 0;
    border-bottom: 2px solid #888;
    margin-bottom: 10px;
}

#captureTarget .hex-ngam-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 100px;
    padding: 0 10px;
    gap: 4px;
    align-self: center;
}

#captureTarget .hex-ngam-indicator span {
    color: #000; /* Black as requested */
    font-weight: 700;
    font-size: 17px;
    text-align: center;
    white-space: nowrap;
    text-transform: uppercase;
    line-height: 1.4;
}

#captureTarget .hex-ngam-inline {
    margin-top: 5px;
    font-size: 15px;
    color: #000; /* Black as requested */
    font-weight: normal;
}

#captureTarget .hex-ngam-indicator:empty {
    display: none;
}

#captureTarget .hex-box {
    text-align: center;
    min-width: 180px;
}

#captureTarget .hex-box-ho {
    text-align: center;
    min-width: 180px;
}

#captureTarget .hex-title {
    font-size: 19px;
    font-weight: 700;
    color: #c41e3a;
    text-transform: uppercase;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

#captureTarget .hex-family {
    font-size: 17px;
    color: #333;
    font-weight: 600;
    margin-top: 12px;
    text-transform: uppercase;
    white-space: nowrap;
}

#captureTarget .gua-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 110px;
    margin: 0 auto;
}

#captureTarget .gua-line {
    height: 16px;
    width: 100%;
}

#captureTarget .yang {
    background-color: #1a1a1a;
}

#captureTarget .yin {
    display: flex;
    justify-content: space-between;
}

#captureTarget .yin::before,
#captureTarget .yin::after {
    content: '';
    display: block;
    width: 42%;
    background-color: #1a1a1a;
    height: 100%;
}

#captureTarget .yang.moving {
    background-color: #e60000;
}

#captureTarget .yin.moving::before,
#captureTarget .yin.moving::after {
    background-color: #e60000;
}

#captureTarget table {
    width: 100%;
    border-collapse: collapse;
    font-size: 17px;
    background: #fefee5;
    margin-bottom: 15px;
}

#captureTarget th,
#captureTarget td {
    border: none;
    border-bottom: 1px solid #d0c8b8;
    padding: 8px 6px;
    text-align: center;
    white-space: nowrap;
    color: #000000;
}

#captureTarget th {
    background: #e2e2cc;
    font-weight: 700;
    color: #1a1a1a;
    font-size: 16px;
    padding: 10px 4px;
    border-bottom: 1px solid #bbb;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

#captureTarget .sep-col {
    border-left: 1px solid rgba(0, 0, 0, 0.25);
}

#captureTarget .row-moving td {
    color: #e60000;
    font-weight: 700;
}

#captureTarget .marker-the {
    color: #1a1a1a;
    font-weight: 700;
    font-size: 17px;
}

#captureTarget .marker-ung {
    color: #1a1a1a;
    font-weight: 700;
    font-size: 17px;
}

#captureTarget .row-moving .marker-the {
    color: #e60000;
}

#captureTarget .row-moving .marker-ung {
    color: #e60000;
}

#captureTarget .phuc-than {
    font-size: 17px;
    color: #1a1a1a;
    font-weight: normal;
}

#captureTarget .row-moving .phuc-than {
    color: #e60000;
    font-weight: 700;
}

#captureTarget .shensha-section {
    margin-top: 10px;
    border-top: 2px solid #888;
    padding-top: 10px;
}

#captureTarget .shensha-title {
    font-weight: 700;
    font-size: 17px;
    margin-bottom: 10px;
    color: #1a1a1a;
    text-transform: uppercase;
}

#captureTarget .shensha-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px 12px;
}

#captureTarget .ss-item {
    font-size: 17px;
    padding: 4px 0;
    border-bottom: 1px solid #d0c8b8;
    color: #1a1a1a;
}

#captureTarget .ss-item strong {
    color: #1a1a1a;
}


#captureTarget .watermark {
    text-align: right;
    font-size: 16px;
    font-weight: 600;
    color: #555;
    margin-top: 15px;
    font-style: italic;
}

/* ========================================
   LOADING OVERLAY
   ======================================== */

#loading-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(12,18,34,0.95);
    backdrop-filter: blur(8px);
    z-index: 999;
    justify-content: center;
    align-items: center;
}

#loading-overlay.visible { display: flex; }

.loader-content {
    text-align: center;
    color: var(--text-primary);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

.loader-content p { font-size: 1rem; font-weight: 500; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ========================================
   COIN TOSS OVERLAY
   Full-screen immersive experience
   ======================================== */

.toss-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(8,12,24,0.97);
    backdrop-filter: blur(10px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.toss-overlay.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.toss-panel {
    width: 100%;
    max-width: 500px;
    height: 100%;
    max-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 0 12px;
    overflow-y: auto;
    overflow-x: hidden;
}

.toss-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 4px;
    flex-shrink: 0;
}

.toss-header h3 {
    font-size: 1.2rem;
    color: var(--accent);
    margin: 0;
}

.close-btn {
    background: rgba(255,255,255,0.1);
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-btn:hover {
    background: rgba(239,68,68,0.2);
    color: var(--danger);
}

.toss-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding-bottom: 24px;
}

/* --- Progress --- */
.toss-progress {
    width: 100%;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-dark), var(--accent-light));
    border-radius: 3px;
    transition: width 0.4s ease;
}

.toss-status-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* --- Coin Area --- */
.coin-area {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    width: 100%;
    perspective: 1200px;
    position: relative;
}

/* --- Smoke Effect --- */
.smoke-container {
    position: absolute;
    bottom: -10px;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    pointer-events: none;
    z-index: 2; /* Put smoke IN FRONT of the coins */
}

.smoke-s {
    position: absolute;
    bottom: 0;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
    filter: blur(10px);
    opacity: 0;
    animation: smoke-rise 5s ease-in infinite;
}

.smoke-s:nth-child(1) { left: 25%; animation-duration: 4.5s; animation-delay: 0s; width: 80px; height: 80px; }
.smoke-s:nth-child(2) { left: 35%; animation-duration: 5s; animation-delay: 0.5s; animation-name: smoke-rise-alt; }
.smoke-s:nth-child(3) { left: 45%; animation-duration: 4s; animation-delay: 1s; width: 90px; height: 90px; }
.smoke-s:nth-child(4) { left: 55%; animation-duration: 5.5s; animation-delay: 1.5s; animation-name: smoke-rise-alt; }
.smoke-s:nth-child(5) { left: 65%; animation-duration: 4.2s; animation-delay: 2s; width: 75px; height: 75px; }
.smoke-s:nth-child(6) { left: 75%; animation-duration: 5s; animation-delay: 2.5s; animation-name: smoke-rise-alt; }
.smoke-s:nth-child(7) { left: 30%; animation-duration: 4.8s; animation-delay: 3s; width: 100px; height: 100px; }
.smoke-s:nth-child(8) { left: 50%; animation-duration: 5.2s; animation-delay: 3.5s; animation-name: smoke-rise-alt; }
.smoke-s:nth-child(9) { left: 70%; animation-duration: 4.5s; animation-delay: 4s; width: 85px; height: 85px; }
.smoke-s:nth-child(10) { left: 40%; animation-duration: 5.5s; animation-delay: 4.5s; animation-name: smoke-rise-alt; }

@keyframes smoke-rise {
    0% { transform: translate(0, 0) scale(1); opacity: 0; }
    20% { opacity: 0.8; }
    50% { transform: translate(-15px, -100px) scale(2.5); }
    80% { opacity: 0.3; }
    100% { transform: translate(10px, -220px) scale(4.5); opacity: 0; }
}

@keyframes smoke-rise-alt {
    0% { transform: translate(0, 0) scale(1); opacity: 0; }
    20% { opacity: 0.8; }
    50% { transform: translate(15px, -100px) scale(2.5); }
    80% { opacity: 0.3; }
    100% { transform: translate(-10px, -220px) scale(4.5); opacity: 0; }
}

.coin-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.coin-wrapper {
    width: 80px;
    height: 80px;
}

.coin {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s ease-out;
    will-change: transform;
}

.coin-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.6), inset 0 0 8px rgba(255,215,0,0.2);
    border: 2px solid #d4af37;
}

.coin-face.front { transform: rotateY(0deg); }
.coin-face.back { transform: rotateY(180deg); }

/* Toss Animation - Dramatic coin flip */
.coin.tossing {
    animation: coin-toss-dramatic 1.8s ease-in-out forwards;
}

.coin-wrapper:nth-child(2) .coin.tossing { animation-delay: 0.08s; }
.coin-wrapper:nth-child(3) .coin.tossing { animation-delay: 0.16s; }

@keyframes coin-toss-dramatic {
    0%   { transform: translateY(0) rotateY(0) scale(1); }
    15%  { transform: translateY(-100px) rotateY(720deg) scale(1.2); }
    35%  { transform: translateY(-180px) rotateY(1800deg) scale(1.1); }
    60%  { transform: translateY(-40px) rotateY(2880deg) scale(1.05); }
    80%  { transform: translateY(10px) rotateY(3420deg) scale(0.95); }
    100% { transform: translateY(0) rotateY(3600deg) scale(1); }
}

/* --- Toss Button --- */
.btn-toss {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: inherit;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: 2px solid var(--primary-light);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all 0.2s;
    box-shadow: var(--shadow-md);
}

.btn-toss:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-toss:active { transform: translateY(0) scale(0.98); }

.btn-toss:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-finish {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 700;
    font-family: inherit;
    background: linear-gradient(135deg, #059669, #047857);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all 0.2s;
    box-shadow: var(--shadow-md);
    animation: pulse-finish 1.5s ease-in-out infinite;
}

@keyframes pulse-finish {
    0%, 100% { box-shadow: var(--shadow-md); }
    50% { box-shadow: 0 0 20px rgba(16,185,129,0.4), var(--shadow-md); }
}

.btn-finish:hover {
    background: linear-gradient(135deg, #10b981, #059669);
    transform: translateY(-1px);
}

/* --- Hexagram Building Display --- */
.hex-building {
    width: 100%;
    display: flex;
    flex-direction: column-reverse;
    gap: 6px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    min-height: 40px;
}

.hex-line-result {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    animation: lineAppear 0.4s ease;
}

@keyframes lineAppear {
    from { opacity: 0; transform: translateX(-15px); }
    to { opacity: 1; transform: translateX(0); }
}

.hex-num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 16px;
    text-align: center;
}

.hex-visual {
    flex: 1;
    height: 8px;
    border-radius: 2px;
}

.hex-visual.yang-line {
    background: #c8b273;
}

.hex-visual.yin-line {
    display: flex;
    gap: 14px;
}

.hex-visual.yin-line::before,
.hex-visual.yin-line::after {
    content: '';
    flex: 1;
    height: 8px;
    background: #c8b273;
    border-radius: 2px;
}

.hex-visual.moving-line {
    background: #ef4444;
}

.hex-visual.yin-line.moving-line { background: none; }
.hex-visual.yin-line.moving-line::before,
.hex-visual.yin-line.moving-line::after {
    background: #ef4444;
}

.hex-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 65px;
    text-align: right;
}

.hex-line-result.moving .hex-desc {
    color: var(--warning);
    font-weight: 600;
}

/* ========================================
   RESPONSIVE (already mobile-first)
   ======================================== */

@media (max-width: 380px) {
    .app-container { padding: 10px 8px; }
    .hero-section h1 { font-size: 1.3rem; }
    .btn-main-cta { padding: 14px 16px; font-size: 1rem; }
    .cta-coin-icon { width: 34px; height: 34px; }
    .coin-wrapper { width: 65px; height: 65px; }
    .auth-right-centered { gap: 8px; }
    .btn-auth { padding: 8px 12px; font-size: 0.9rem; }
    .btn-auto-divine { padding: 12px 14px; font-size: 1rem; }
}

/* Mobile touch optimization */
@media (max-width: 500px) {
    .auth-modal-content {
        width: 94%;
        padding: 20px 16px;
    }
    .btn-auto-divine {
        padding: 14px 16px;
        font-size: 1.05rem;
    }
    .auth-right-centered {
        gap: 8px;
        align-items: center;
        flex-wrap: wrap;
        justify-content: center;
    }
    .btn-auth {
        padding: 10px 14px;
        font-size: 0.95rem;
    }
    .user-menu-wrapper {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px !important;
        margin-top: 5px;
    }
    .user-name {
        display: none; /* Hide email on mobile to save space */
    }
    .user-info-inline {
        padding: 4px 10px !important;
    }
    .btn-earn-xu span {
        display: none; /* Hide icon on very small screens to save space */
    }
    .text-logout {
        display: none; /* Hide text, just show icon on mobile */
    }
}

/* ========================================
   SEO CONTENT SECTION
   ======================================== */
.seo-content-section {
    margin-top: 32px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.seo-summary {
    padding: 16px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent-light);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.seo-summary::-webkit-details-marker {
    display: none;
}

.seo-summary::after {
    content: '▼';
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.seo-details[open] .seo-summary::after {
    transform: rotate(180deg);
}

.seo-details .seo-container {
    padding: 0 24px 24px 24px;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 8px;
    padding-top: 16px;
    animation: fadeInDown 0.3s ease-out;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.seo-content-section h2 {
    font-size: 1.15rem;
    color: var(--accent-light);
    margin-bottom: 12px;
}

.seo-content-section h3 {
    font-size: 1.05rem;
    color: white;
    margin-top: 16px;
    margin-bottom: 8px;
}

.seo-content-section p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.seo-content-section p:last-child {
    margin-bottom: 0;
}

.faq-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
}

.faq-item h4 {
    font-size: 1rem;
    color: var(--accent-light);
    margin-bottom: 6px;
    font-weight: 600;
}

.faq-item p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

.seo-note {
    font-style: italic;
    color: var(--text-muted);
    margin-top: 16px;
}

/* ============================================
   AI & AUTH STYLES
   ============================================ */

.auth-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 20px;
    background: rgba(12, 18, 34, 0.9);
    border-bottom: 1px solid rgba(255, 215, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
}

.badge-ai {
    background: linear-gradient(135deg, #f1c40f, #f39c12);
    color: #000;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    box-shadow: 0 0 10px rgba(241, 196, 15, 0.4);
}

.btn-auth {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: 0.2s;
}

.auth-right-centered {
    display: flex;
    justify-content: center;
    gap: 15px;
    width: 100%;
}

.btn-auto-divine {
    background: linear-gradient(135deg, #d97706, #b45309);
    border: 1px solid #f59e0b;
    color: #fff;
    padding: 14px 20px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.btn-auto-divine:hover {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    box-shadow: 0 4px 12px rgba(217,119,6,0.4);
}


.btn-auth:hover {
    background: rgba(255, 215, 0, 0.1);
}

.btn-auth.btn-primary {
    background: var(--accent);
    color: #000;
}

.btn-auth.btn-primary:hover {
    background: #ffc107;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-name {
    font-weight: 600;
    color: #fff;
    font-size: 0.9rem;
}

.xu-display {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: bold;
    color: var(--accent);
    background: rgba(255, 215, 0, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
}

.btn-logout {
    background: none;
    border: none;
    color: #e74c3c;
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: underline;
}

.btn-checkin {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    border: none;
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(46, 204, 113, 0.3);
}

.pulse {
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(46, 204, 113, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}

/* Modal Auth */
.auth-modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.auth-modal-content {
    background: var(--card-bg);
    border: 1px solid rgba(255, 215, 0, 0.3);
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

.auth-close {
    position: absolute;
    top: 10px; right: 15px;
    font-size: 24px;
    color: #fff;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    outline: none;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
}

.auth-tab {
    flex: 1;
    text-align: center;
    padding: 10px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted);
}

.auth-tab.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

.auth-form h3 {
    margin-bottom: 15px;
    text-align: center;
    font-size: 1.2rem;
}

.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: #ccc;
}
.form-group input {
    width: 100%;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(0,0,0,0.3);
    color: #fff;
    font-size: 1rem;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #f1c40f, #f39c12);
    border: none;
    border-radius: 6px;
    color: #000;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
}

.auth-error {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-bottom: 10px;
    display: none;
    text-align: center;
}

/* AI Section */
.ai-section {
    margin-top: 30px;
    animation: fadeIn 0.5s ease-out;
}

.ai-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 8px 32px var(--shadow-color);
}

.ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.ai-header h2 {
    font-size: 1.4rem;
    color: var(--accent);
    margin: 0;
}
.ai-badge-pro {
    background: #e74c3c;
    color: #fff;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 900;
}
.ai-description {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.ai-input-group {
    margin-bottom: 20px;
}
.ai-input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #ddd;
}
.ai-input-group textarea {
    width: 100%;
    height: 80px;
    background: rgba(0,0,0,0.2);
    border: 1px solid rgba(255,215,0,0.3);
    border-radius: 8px;
    padding: 12px;
    color: #fff;
    font-family: 'Inter', sans-serif;
    resize: vertical;
}

.ai-models {
    margin-bottom: 20px;
}
.model-cards {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 10px;
}
.model-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 10px 15px;
    min-width: 140px;
    cursor: pointer;
    transition: 0.2s;
    text-align: center;
}
.model-card.selected {
    border-color: var(--accent);
    background: rgba(255, 215, 0, 0.1);
}
.model-name {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
}
.model-price {
    font-size: 0.75rem;
    color: var(--accent);
}

.btn-ai-divine {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #e67e22, #d35400);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    transition: 0.2s;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.4);
}
.btn-ai-divine:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.6);
}
.btn-ai-divine:disabled {
    background: #555;
    color: #999;
    cursor: not-allowed;
    box-shadow: none;
}

.ai-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px;
    color: var(--accent);
}
.ai-spinner {
    width: 40px; height: 40px;
    border: 4px solid rgba(255,215,0,0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 10px;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

.ai-result-container {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px dashed rgba(255,215,0,0.2);
}
.ai-result-container h3 {
    text-align: center;
    color: var(--accent);
    margin-bottom: 20px;
}

.ai-step-card {
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    margin-bottom: 15px;
    border-left: 4px solid var(--accent);
    overflow: hidden;
}
.ai-step-header {
    padding: 12px 15px;
    background: rgba(255,255,255,0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}
.ai-step-header h4 {
    margin: 0;
    font-size: 1rem;
}
.ai-step-toggle {
    transition: 0.3s;
    font-size: 0.8rem;
}
.ai-step-card.collapsed .ai-step-toggle {
    transform: rotate(-90deg);
}
.ai-step-content {
    padding: 15px;
    font-size: 1.05rem;
    line-height: 1.8;
    color: #e0e0e0;
    text-align: left;
}
.ai-step-content p {
    margin: 0 0 8px 0;
}
.ai-step-content ul.ai-bullet-list {
    list-style: none;
    padding: 0;
    margin: 8px 0;
}
.ai-step-content ul.ai-bullet-list li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 8px;
    line-height: 1.7;
}
.ai-step-content ul.ai-bullet-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}
.ai-step-card.collapsed .ai-step-content {
    display: none;
}
.ai-disclaimer {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.75);
    text-align: justify;
    margin-top: 25px;
    padding: 15px;
    background: rgba(241, 196, 15, 0.03);
    border: 1px dashed rgba(241, 196, 15, 0.25);
    border-radius: 10px;
    line-height: 1.6;
}

/* User Menu Dropdown Styles */
.user-menu-wrapper {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 8px;
    transition: 0.2s;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
}

.dropdown-trigger:hover {
    background: rgba(255,255,255,0.1);
}

.avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #f1c40f, #f39c12);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #000;
}

.avatar svg {
    width: 20px;
    height: 20px;
}

.user-info-short {
    display: flex;
    flex-direction: column;
}

.user-info-short .user-name {
    font-weight: 600;
    font-size: 0.85rem;
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-info-short .user-balance {
    font-size: 0.75rem;
    color: #ccc;
}

.dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background: #1e293b;
    min-width: 180px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 200;
    overflow: hidden;
    animation: fadeIn 0.2s ease;
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    padding: 12px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
    color: #eee;
    transition: 0.2s;
}

.dropdown-item:hover {
    background: rgba(255,255,255,0.05);
    color: #f1c40f;
}

.dropdown-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
}

.text-danger:hover {
    color: #e74c3c !important;
    background: rgba(231, 76, 60, 0.1) !important;
}

/* ========================================
   MISSIONS UI (Kiếm Xu)
   ======================================== */
.mission-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.mission-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    gap: 8px;
    border-radius: 10px;
    padding: 12px 15px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.mission-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.mission-item.mission-hot {
    background: rgba(230, 126, 34, 0.1);
    border-color: rgba(230, 126, 34, 0.4);
}
.mission-item.mission-hot .mission-title {
    color: #f1c40f;
    font-weight: bold;
}
.mission-info {
    flex: 1;
    min-width: 0;
}
.mission-title {
    font-size: 0.95rem;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 4px;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.mission-reward {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    white-space: nowrap;
}

.mission-action {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    flex-shrink: 0;
}
.btn-mission {
    background: var(--accent);
    color: #000;
    border: none;
    padding: 6px 0;
    width: 90px;
    text-align: center;
    border-radius: 20px;
    font-size: 0.85rem;
    white-space: nowrap;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
    flex-shrink: 0;
}
.btn-mission:hover {
    background: #f39c12;
}
.btn-mission.completed {
    background: rgba(255,255,255,0.1);
    color: #888;
    cursor: default;
    pointer-events: none;
}
.btn-mission.completed::before {
    content: "✓ ";
}
.mission-pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}
.btn-page {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
}
.btn-page:hover:not(:disabled) {
    background: rgba(255,255,255,0.2);
}
.btn-page:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
/* --- TOAST NOTIFICATION --- */
#toast-container { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 10px; pointer-events: none; }
.toast-msg { background: rgba(0,0,0,0.85); color: #fff; padding: 12px 24px; border-radius: 25px; font-size: 0.95rem; font-weight: 500; text-align: center; box-shadow: 0 4px 12px rgba(0,0,0,0.3); opacity: 0; transform: translateY(20px); transition: opacity 0.3s ease, transform 0.3s ease; max-width: 90vw; }
.toast-msg.show { opacity: 1; transform: translateY(0); }
.toast-success { border-left: 4px solid #2ecc71; background: rgba(46,204,113,0.15); }
.toast-error { border-left: 4px solid #e74c3c; background: rgba(231,76,60,0.15); }
.toast-warning { border-left: 4px solid #f1c40f; background: rgba(241,196,15,0.15); }
/* --- BUTTON ACTIVE STATES --- */
button:active, .btn:active, .btn-auth:active, .btn-mission:active, .auth-tab:active { transform: scale(0.96); transition: transform 0.1s; }
button, .btn { min-height: 44px; /* Mobile touch target */ }


.btn-zalo { background: #0068FF !important; color: #fff !important; border-color: #0068FF !important; } .btn-zalo:hover { background: #0056d6 !important; }

/* --- TRANSACTION HISTORY MODAL --- */
.tx-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 2px;
}
.tx-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 0.95rem;
    gap: 15px;
    transition: background 0.2s;
}
.tx-item:hover {
    background: rgba(255, 255, 255, 0.06);
}
.tx-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0; /* Ensures truncation works */
    flex: 1;
}
.tx-desc {
    color: #fff;
    font-weight: 500;
    line-height: 1.3;
    word-break: break-word; /* Wrap descriptions nicely */
}
.tx-time {
    font-size: 0.8rem;
    color: #888;
}
.tx-amount {
    font-size: 1rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
    padding: 4px 8px;
    border-radius: 6px;
}
.tx-amount.plus {
    color: #2ecc71;
    background: rgba(46, 204, 113, 0.1);
}
.tx-amount.minus {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
}