/* Seollal Greetings Generator - DopaBrain */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}

/* Touch optimization */
button, a, [role="button"], [role="link"] {
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

/* ============ CSS VARIABLES ============ */
:root {
    --primary: #be185d;
    --primary-light: #e11d74;
    --primary-dark: #9f1239;
    --primary-glow: rgba(190, 24, 93, 0.4);
    --gold: #fbbf24;
    --gold-light: #fcd34d;
    --gold-dark: #f59e0b;
    --red: #ef4444;
    --red-dark: #dc2626;
    --bg: #060612;
    --bg2: #0f0f24;
    --bg3: #161636;
    --card: rgba(190, 24, 93, 0.06);
    --card-border: rgba(190, 24, 93, 0.15);
    --card-hover: rgba(190, 24, 93, 0.12);
    --glass: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text: #f1f1f5;
    --text-sub: rgba(255, 255, 255, 0.6);
    --text-dim: rgba(255, 255, 255, 0.35);
    --radius: 20px;
    --radius-sm: 12px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Light Mode */
[data-theme="light"] {
    --bg: #fdf2f8;
    --bg2: #fce7f3;
    --bg3: #fbcfe8;
    --card: rgba(190, 24, 93, 0.06);
    --card-border: rgba(190, 24, 93, 0.15);
    --card-hover: rgba(190, 24, 93, 0.1);
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(190, 24, 93, 0.12);
    --text: #1a1a2e;
    --text-sub: rgba(26, 26, 46, 0.65);
    --text-dim: rgba(26, 26, 46, 0.4);
    --primary-glow: rgba(190, 24, 93, 0.15);
    --shadow: 0 8px 32px rgba(190, 24, 93, 0.1);
}

/* ============ SKIP LINK ============ */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    z-index: 10001;
    text-decoration: none;
    font-weight: 600;
    transition: top 0.3s;
}
.skip-link:focus {
    top: 12px;
}

/* ============ APP LOADER ============ */
.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}
.app-loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.loader-content {
    text-align: center;
}
.loader-emoji {
    font-size: 48px;
    animation: loaderBounce 1s ease-in-out infinite;
}
.loader-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--card-border);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 16px auto;
    animation: spin 0.8s linear infinite;
}
.loader-text {
    color: var(--text-sub);
    font-size: 14px;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
@keyframes loaderBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ============ BODY & LAYOUT ============ */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
    background: linear-gradient(160deg, var(--bg) 0%, var(--bg2) 50%, var(--bg) 100%);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    max-width: 520px;
    margin: 0 auto;
    padding: 24px 16px 40px;
    min-height: 100vh;
}

/* ============ THEME TOGGLE ============ */
.theme-toggle {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    font-size: 18px;
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, background 0.2s;
}
.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--card-hover);
}

/* ============ LANGUAGE SELECTOR ============ */
.language-selector {
    position: fixed;
    top: 16px;
    right: 68px;
    z-index: 100;
}
.lang-btn {
    width: 44px;
    height: 44px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, background 0.2s;
}
.lang-btn:hover {
    transform: scale(1.1);
    background: var(--card-hover);
}
.lang-menu {
    position: absolute;
    top: 52px;
    right: 0;
    background: var(--bg2);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 8px;
    min-width: 160px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}
.lang-menu.hidden {
    display: none;
}
.lang-option {
    display: block;
    width: 100%;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: var(--text);
    font-size: 14px;
    text-align: left;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}
.lang-option:hover {
    background: var(--card-hover);
}
.lang-option.active {
    background: var(--primary);
    color: #fff;
}

/* ============ FLOATING DECORATIONS ============ */
.floating-deco {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}
.float-particle {
    position: absolute;
    font-size: 20px;
    opacity: 0.3;
    animation: floatUp 8s ease-in-out infinite;
}
@keyframes floatUp {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    20% { opacity: 0.3; }
    80% { opacity: 0.3; }
    100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

/* ============ SCREENS ============ */
.screen {
    position: relative;
    z-index: 1;
    animation: fadeIn 0.4s ease;
}
.screen.hidden {
    display: none;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============ SCREEN HEADER ============ */
.screen-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}
.screen-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
}
.btn-back {
    width: 44px;
    height: 44px;
    border: 1px solid var(--card-border);
    border-radius: 50%;
    background: var(--glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
    flex-shrink: 0;
}
.btn-back:hover {
    background: var(--card-hover);
    transform: scale(1.05);
}

/* ============ INTRO SCREEN ============ */
.intro-content {
    text-align: center;
    padding: 60px 0 40px;
}
.intro-icon {
    font-size: 72px;
    margin-bottom: 16px;
    animation: introFloat 3s ease-in-out infinite;
}
@keyframes introFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-8px) scale(1.05); }
}
.intro-content h1 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-light), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.intro-year {
    font-size: 18px;
    color: var(--gold);
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 2px;
}
.intro-sub {
    font-size: 18px;
    color: var(--text);
    font-weight: 600;
    margin-bottom: 8px;
}
.intro-desc {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.6;
    margin-bottom: 28px;
}
.intro-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
}
.intro-badge {
    padding: 8px 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-sub);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* ============ BUTTONS ============ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 14px 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    border-radius: 16px;
    font-size: 17px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 20px var(--primary-glow);
    width: 100%;
    max-width: 320px;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px var(--primary-glow);
}
.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 24px;
    background: var(--glass);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: background 0.2s, transform 0.2s;
    width: 100%;
}
.btn-secondary:hover {
    background: var(--card-hover);
    transform: translateY(-1px);
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 13px;
    cursor: pointer;
    padding: 8px 16px;
    transition: color 0.2s;
}
.btn-text:hover {
    color: var(--text-sub);
}

/* ============ RECIPIENT CARD GRID ============ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.select-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 24px 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    transition: all 0.25s ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    min-height: 110px;
}
.select-card:hover {
    background: var(--card-hover);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--primary-glow);
}
.select-card:active {
    transform: translateY(0) scale(0.97);
}
.select-card-wide {
    grid-column: 1 / -1;
}
.card-icon {
    font-size: 36px;
}
.card-label {
    font-size: 15px;
    font-weight: 600;
}

/* ============ TONE OPTIONS ============ */
.tone-desc {
    color: var(--text-sub);
    font-size: 14px;
    margin-bottom: 20px;
}
.tone-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.tone-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    transition: all 0.25s ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-align: left;
    min-height: 72px;
}
.tone-card:hover {
    background: var(--card-hover);
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: 0 4px 16px var(--primary-glow);
}
.tone-card:active {
    transform: translateX(0) scale(0.98);
}
.tone-icon {
    font-size: 32px;
    flex-shrink: 0;
}
.tone-label {
    font-size: 16px;
    font-weight: 700;
    display: block;
}
.tone-hint {
    font-size: 13px;
    color: var(--text-sub);
    display: block;
    margin-top: 2px;
}

/* ============ RESULT SCREEN ============ */
.result-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    color: var(--text-sub);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.result-info .ri-icon {
    font-size: 24px;
}

.greeting-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

/* ============ GREETING CARD ============ */
.greeting-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    animation: cardIn 0.5s ease backwards;
}
.greeting-card:nth-child(1) { animation-delay: 0.05s; }
.greeting-card:nth-child(2) { animation-delay: 0.15s; }
.greeting-card:nth-child(3) { animation-delay: 0.25s; }
.greeting-card:nth-child(4) { animation-delay: 0.35s; }

@keyframes cardIn {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.greeting-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--gold), var(--red));
    border-radius: var(--radius) var(--radius) 0 0;
}
.greeting-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(190, 24, 93, 0.15);
}

.greeting-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 12px;
}

.greeting-text {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    margin-bottom: 16px;
    word-break: keep-all;
    white-space: pre-line;
}

.greeting-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    min-height: 44px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-action:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-action.copied {
    background: #059669;
    border-color: #059669;
    color: #fff;
}

/* ============ RESULT ACTIONS ============ */
.result-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
}

/* ============ AD ============ */
.ad-banner {
    text-align: center;
    padding: 12px;
    margin: 16px 0;
}
.ad-placeholder {
    color: var(--text-dim);
    font-size: 12px;
}

/* ============ HISTORY ============ */
.history-section {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
}
.history-section h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}
.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}
.history-item {
    padding: 14px 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-sub);
    word-break: keep-all;
    white-space: pre-line;
}

/* ============ FOOTER ============ */
.app-footer {
    text-align: center;
    padding: 32px 16px 24px;
    color: var(--text-dim);
    font-size: 13px;
}
.app-footer a {
    color: var(--primary-light);
    text-decoration: none;
}
.app-footer a:hover {
    text-decoration: underline;
}

/* ============ TOAST ============ */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg3);
    color: var(--text);
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    font-size: 14px;
    font-weight: 600;
    z-index: 9999;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
}
.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 380px) {
    .intro-content h1 {
        font-size: 28px;
    }
    .card-grid {
        gap: 8px;
    }
    .select-card {
        padding: 18px 12px;
        min-height: 90px;
    }
    .greeting-card {
        padding: 18px;
    }
}
@media (min-width: 520px) {
    .app-container {
        padding: 32px 24px 48px;
    }
}

/* ============ REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}