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

:root {
    --bg: #f0f7ff;
    --card-bg: #ffffff;
    --primary: #4a90d9;
    --up: #4caf50;
    --down: #ef5350;
    --skip: #90a4ae;
    --generate: #7c4dff;
    --text: #2c3e50;
    --text-light: #607d8b;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --radius: 20px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    padding: 1rem;
}

.container {
    max-width: 480px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 0;
}

header {
    text-align: center;
}

h1 {
    font-size: 1.8rem;
    color: var(--primary);
    font-weight: 800;
}

.subtitle {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

/* Card */
.card-wrapper {
    width: 100%;
    perspective: 600px;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2.5rem 2rem;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.card.swipe-left {
    transform: translateX(-120%) rotate(-15deg);
    opacity: 0;
}

.card.swipe-right {
    transform: translateX(120%) rotate(15deg);
    opacity: 0;
}

.card.swipe-up {
    transform: translateY(-120%);
    opacity: 0;
}

.question-text {
    font-size: 1.35rem;
    line-height: 1.5;
    font-weight: 500;
}

.badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 8px;
    background: #e8f5e9;
    color: #388e3c;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.badge.generated {
    background: #ede7f6;
    color: #5e35b1;
}

.badge:empty {
    display: none;
}

/* Action buttons */
.actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
}

.btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: scale(0.92);
}

.btn-up {
    background: var(--up);
    color: white;
}

.btn-down {
    background: var(--down);
    color: white;
}

.btn-skip {
    background: var(--skip);
    color: white;
    width: 52px;
    height: 52px;
}

/* Generate button */
.btn-generate {
    background: var(--generate);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.15s ease;
    box-shadow: 0 2px 8px rgba(124, 77, 255, 0.3);
}

.btn-generate:active {
    transform: scale(0.96);
}

.btn-generate:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Stats */
.stats {
    color: var(--text-light);
    font-size: 0.8rem;
    text-align: center;
}

/* Fade-in for new card */
@keyframes fade-in {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.card.entering {
    animation: fade-in 0.3s ease;
}

/* Loading spinner on generate button */
.btn-generate.loading::after {
    content: "";
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 0.5rem;
    vertical-align: middle;
}

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