:root {
    --primary-color: #4a3728;
    --accent-color: #8b6d05;
    --bg-color: #fdfbf7;
    --card-bg: #ffffff;
    --text-color: #1a1a1a;
    --muted-text: #555555;
    --border-radius: 20px;
    --shadow: 0 12px 40px rgba(74, 55, 40, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Pretendard', -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
    margin-top: 5vh;
}

header {
    margin-bottom: 30px;
    text-align: center;
}

header h1 {
    font-family: 'Noto Serif KR', serif;
    font-size: 2.2rem;
    color: var(--primary-color) !important;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
    font-weight: 700;
}

header p {
    color: var(--muted-text) !important;
    font-size: 1rem;
    margin-bottom: 20px;
}

.input-group {
    background: var(--card-bg);
    padding: 10px;
    border-radius: 24px;
    box-shadow: var(--shadow);
    display: flex;
    margin-bottom: 30px;
    border: 2px solid rgba(139, 109, 5, 0.2);
}

input[type="text"] {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    font-size: 1.1rem;
    outline: none;
    color: #000000 !important;
    font-weight: 500;
}

button#generateBtn {
    padding: 0 28px;
    background-color: var(--primary-color);
    color: #ffffff !important;
    border: none;
    border-radius: 18px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

button#generateBtn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

/* Loading Animation */
.loading-area {
    text-align: center;
    padding: 40px 0;
}

.loading-area p {
    margin-top: 15px;
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
}

.loader {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.result-area { margin-top: 30px; }
.result-area.hidden, .loading-area.hidden { display: none; }

.selection-guide {
    text-align: center;
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.cards-container {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.poem-card {
    background: #ffffff !important;
    padding: 30px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: relative;
    border: 1px solid rgba(139, 109, 5, 0.2);
    overflow: hidden;
    animation: fadeInUp 0.6s forwards;
}

.poem-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.card-tag {
    position: absolute;
    top: 12px; right: 15px;
    font-size: 0.7rem;
    background: #fdfaf2;
    padding: 4px 10px;
    border-radius: 20px;
    color: var(--muted-text);
}

.poem-content {
    font-family: 'Noto Serif KR', serif;
    font-size: 1.2rem;
    text-align: left;
    margin-bottom: 25px;
    word-break: keep-all;
    color: #222222 !important;
}

.poem-line {
    margin-bottom: 15px;
    line-height: 1.6;
}

/* 첫 글자 강조 복원 및 강화 */
.first-char {
    color: var(--accent-color) !important;
    font-weight: 800 !important;
    font-size: 1.5rem !important;
    margin-right: 2px !important;
    border-bottom: 2px solid rgba(139, 109, 5, 0.4) !important;
    display: inline-block !important;
}

.final-line {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px dashed rgba(109, 88, 69, 0.2);
    font-weight: 600;
    color: var(--primary-color) !important;
    font-size: 1rem;
    text-align: center;
}

.copy-btn-small {
    width: 100%;
    background-color: #fdfaf2;
    color: var(--primary-color) !important;
    border: 1.5px solid rgba(109, 88, 69, 0.2);
    font-size: 0.9rem;
    padding: 12px;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
}

.copy-btn-small.success {
    background-color: #e8f5e9;
    border-color: #81c784;
    color: #2e7d32 !important;
}

footer {
    margin-top: 60px;
    text-align: center;
    font-size: 0.9rem;
    color: var(--muted-text) !important;
    padding-bottom: 50px;
}

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

@media (max-width: 480px) {
    header h1 { font-size: 1.8rem; }
    .poem-content { font-size: 1.1rem; }
}