/* ==========================================================
   AI Lie Detector - Main Stylesheet
   Dark mode, glassmorphism, responsive, animations
   ========================================================== */

:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #131933;
    --bg-card: rgba(255, 255, 255, 0.06);
    --bg-card-hover: rgba(255, 255, 255, 0.1);
    --border-glass: rgba(255, 255, 255, 0.12);
    --text-primary: #f0f2ff;
    --text-secondary: #a0a8c0;
    --accent-purple: #7c5cff;
    --accent-pink: #ff5ca8;
    --accent-blue: #4dc9ff;
    --accent-green: #3ddc97;
    --accent-red: #ff5c5c;
    --accent-yellow: #ffd93d;
    --gradient-main: linear-gradient(135deg, #7c5cff 0%, #ff5ca8 100%);
    --gradient-success: linear-gradient(135deg, #3ddc97 0%, #4dc9ff 100%);
    --gradient-danger: linear-gradient(135deg, #ff5c5c 0%, #ff9966 100%);
    --shadow-glow: 0 8px 32px rgba(124, 92, 255, 0.25);
    --radius: 18px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    height: 100%;
}

body {
    font-family: 'Poppins', 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-primary);
    background-image:
        radial-gradient(circle at 20% 20%, rgba(124, 92, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(255, 92, 168, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(77, 201, 255, 0.08) 0%, transparent 60%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.muted { color: var(--text-secondary); }
.small { font-size: 0.8rem; }

/* ===================== Glassmorphism Card ===================== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-glow);
    padding: 24px;
    transition: var(--transition);
}

.glass-card:hover {
    background: var(--bg-card-hover);
}

/* ===================== Buttons ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border: none;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-primary);
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient-main);
    box-shadow: 0 4px 20px rgba(124, 92, 255, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 28px rgba(124, 92, 255, 0.6);
}

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
}
.btn-secondary:hover { background: var(--bg-card-hover); }

.btn-success { background: var(--gradient-success); color: #052e22; }
.btn-warning { background: var(--accent-yellow); color: #2a2300; }
.btn-danger  { background: var(--gradient-danger); color: #2a0500; }

.btn-small { padding: 6px 12px; font-size: 0.8rem; border-radius: 8px; }
.btn-block { width: 100%; }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===================== Layout Containers ===================== */
.app-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: block; /* changed from flex to block — screens now stack normally */
}

.screen {
    display: none;
    flex-direction: column;
    animation: fadeIn 0.4s ease;
}
.screen.active {
    display: flex;
    justify-content: flex-start;
    align-items: stretch;
    min-height: calc(100vh - 80px);
}

/* Premium screen — always starts from top */
#screen-premium {
    justify-content: flex-start !important;
    align-items: center;
    padding-top: 20px;
    padding-bottom: 40px;
}

@keyframes comboAppear {
    from { opacity:0; transform:translateY(-6px) scale(0.9); }
    to   { opacity:1; transform:translateY(0) scale(1); }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===================== Home Screen ===================== */
.home-header {
    text-align: center;
    padding: 40px 0 20px;
}

.logo-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 4rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.logo-title {
    font-size: 2.4rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

.logo-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.home-menu {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    max-width: 420px;
    margin: 30px auto;
    width: 100%;
}

.home-menu .btn {
    padding: 18px 24px;
    font-size: 1.1rem;
    justify-content: flex-start;
}

.home-stats {
    width: 100%;
}

.home-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 12px;
}

.home-stat-box {
    text-align: center;
    padding: 14px 8px;
    border-radius: 12px;
    background: rgba(255,255,255,0.04);
}

.home-stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.home-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.user-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    margin-bottom: 10px;
}

.user-bar-name {
    font-weight: 600;
}

.user-bar-level {
    font-size: 0.75rem;
    color: var(--accent-blue);
}

/* ===================== Category Select ===================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
}

@media (min-width: 600px) {
    .category-grid { grid-template-columns: repeat(4, 1fr); }
}

.category-card {
    cursor: pointer;
    text-align: center;
    padding: 20px 10px;
    border-radius: var(--radius);
    transition: var(--transition);
}
.category-card:hover, .category-card.selected {
    border-color: var(--accent-purple);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}
.category-card .cat-icon { font-size: 2rem; display: block; margin-bottom: 6px; }
.category-card .cat-name { font-weight: 600; font-size: 0.9rem; }

/* ===================== Gameplay Screen ===================== */
.game-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    margin-bottom: 8px;
    gap: 8px;
}
.game-header > *:last-child {
    justify-self: end;
}

.game-info-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    padding: 8px 16px;
    font-weight: 600;
    font-size: 0.9rem;
}

.progress-bar-wrap {
    width: 100%;
    height: 10px;
    background: rgba(255,255,255,0.08);
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: 18px;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-main);
    border-radius: 100px;
    transition: width 0.4s ease;
}

.timer-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.timer-circle {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    border: 3px solid var(--accent-blue);
    transition: border-color 0.3s, color 0.3s;
}
.timer-circle.warning { border-color: var(--accent-yellow); color: var(--accent-yellow); }
.timer-circle.danger { border-color: var(--accent-red); color: var(--accent-red); animation: pulse 0.6s infinite; }

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.category-tag {
    display: inline-block;
    background: var(--gradient-main);
    padding: 4px 14px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.question-prompt {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    margin: 10px 0 24px;
}

.statements-wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 700px) {
    .statements-wrap { grid-template-columns: 1fr 1fr; }
}

.statement-card {
    cursor: pointer;
    padding: 28px 20px;
    text-align: center;
    position: relative;
    border-width: 2px;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.statement-card .statement-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.statement-card .statement-text {
    font-size: 1.05rem;
    line-height: 1.5;
}

.lang-hi {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.92em;
    color: var(--text-secondary);
}

.statement-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-purple);
}

.statement-card.selected {
    border-color: var(--accent-purple);
    background: rgba(124, 92, 255, 0.15);
}

.statement-card.correct {
    border-color: var(--accent-green);
    background: rgba(61, 220, 151, 0.15);
    animation: correctPulse 0.6s ease;
}

.statement-card.wrong {
    border-color: var(--accent-red);
    background: rgba(255, 92, 92, 0.15);
    animation: shake 0.5s ease;
}

@keyframes correctPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.04); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-8px); }
    40%, 80% { transform: translateX(8px); }
}

.statement-card.disabled {
    pointer-events: none;
    opacity: 0.6;
}

/* ===================== Combo / Score Effects ===================== */
.combo-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--gradient-success);
    color: #052e22;
    padding: 4px 12px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.8rem;
    animation: comboAppear 0.4s ease;
}

@keyframes comboAppear {
    0% { transform: scale(0); opacity: 0; }
    70% { transform: scale(1.15); }
    100% { transform: scale(1); opacity: 1; }
}

.score-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: 800;
    pointer-events: none;
    z-index: 999;
    animation: scorePop 1s ease forwards;
}
.score-popup.positive { color: var(--accent-green); }
.score-popup.negative { color: var(--accent-red); }

@keyframes scorePop {
    0% { opacity: 0; transform: translate(-50%, -30%) scale(0.5); }
    30% { opacity: 1; transform: translate(-50%, -60%) scale(1.2); }
    100% { opacity: 0; transform: translate(-50%, -90%) scale(1); }
}

/* ===================== Result Screen ===================== */
.result-icon {
    text-align: center;
    font-size: 5rem;
    margin: 10px 0;
    animation: resultBounce 0.6s ease;
}

@keyframes resultBounce {
    0% { transform: scale(0); }
    60% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.result-title {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 8px;
}
.result-title.correct { color: var(--accent-green); }
.result-title.wrong { color: var(--accent-red); }

.result-explanation {
    text-align: center;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 16px 0;
}

.result-points {
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-yellow);
    margin: 10px 0;
}

/* ===================== Leaderboard ===================== */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border-radius: 100px;
    border: 1px solid var(--border-glass);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-family: inherit;
}
.tab-btn.active {
    background: var(--gradient-main);
    color: #fff;
    border-color: transparent;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.leaderboard-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 12px;
    background: rgba(255,255,255,0.04);
    transition: var(--transition);
}
.leaderboard-row:hover { background: rgba(255,255,255,0.08); }
.leaderboard-row.top-1 { border: 1px solid #ffd93d; }
.leaderboard-row.top-2 { border: 1px solid #c0c0c0; }
.leaderboard-row.top-3 { border: 1px solid #cd7f32; }
.leaderboard-row.is-me { border: 1px solid var(--accent-purple); background: rgba(124,92,255,0.1); }

.lb-rank { font-weight: 800; width: 36px; text-align: center; font-size: 1.1rem; }
.lb-name { flex: 1; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-score { font-weight: 700; color: var(--accent-blue); }

/* ===================== Profile ===================== */
.profile-header {
    text-align: center;
    padding: 20px 0;
}
.profile-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 12px;
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 16px;
}
@media (min-width: 600px) {
    .achievements-grid { grid-template-columns: repeat(3, 1fr); }
}

.achievement-card {
    text-align: center;
    padding: 16px 8px;
    opacity: 0.4;
    transition: var(--transition);
}
.achievement-card.earned {
    opacity: 1;
    border-color: var(--accent-yellow);
    box-shadow: 0 4px 16px rgba(255, 217, 61, 0.25);
}
.achievement-card .ach-icon { font-size: 2rem; display: block; margin-bottom: 6px; }
.achievement-card .ach-title { font-weight: 700; font-size: 0.85rem; }
.achievement-card .ach-desc { font-size: 0.7rem; color: var(--text-secondary); margin-top: 4px; }

/* ===================== Forms / Auth ===================== */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 380px;
    margin: 0 auto;
}

input, select, textarea {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-glass);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    width: 100%;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    display: block;
}

/* ===================== Header / Nav ===================== */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.back-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
}

.screen-title {
    font-size: 1.4rem;
    font-weight: 800;
}

/* ===================== Alerts ===================== */
.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}
.alert-error { background: rgba(255,92,92,0.15); border: 1px solid var(--accent-red); color: #ffb3b3; }
.alert-success { background: rgba(61,220,151,0.15); border: 1px solid var(--accent-green); color: #b3ffd9; }

/* ===================== Share Card ===================== */
.share-card {
    background: var(--gradient-main);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    color: #fff;
    margin: 16px 0;
}
.share-card h2 { font-size: 1.6rem; margin-bottom: 4px; }
.share-card .share-score { font-size: 2.6rem; font-weight: 800; margin: 10px 0; }
.share-card .share-rank { font-size: 1rem; opacity: 0.9; }
.share-card .share-achievement { margin-top: 10px; font-size: 0.95rem; }

.share-actions {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

/* ===================== Modals ===================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-box {
    max-width: 420px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

/* ===================== Misc ===================== */
.flex-center { display: flex; align-items: center; justify-content: center; }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.gap-2 { gap: 10px; }

.spinner {
    width: 36px;
    height: 36px;
    border: 4px solid rgba(255,255,255,0.15);
    border-top-color: var(--accent-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 30px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

footer.app-footer {
    text-align: center;
    padding: 20px 0;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

@media (max-width: 480px) {
    .logo-title { font-size: 1.8rem; }
    .glass-card { padding: 16px; }
    .result-icon { font-size: 4rem; }
}