:root {
    /* Dark Mode (Default) - Midnight & Gold */
    --bg-color: #000000;
    --text-color: #ffffff;
    --border-color: rgba(255, 255, 255, 0.2);
    --accent-color: #d4af37; /* Gold */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    --input-bg: transparent;
}

[data-theme="light"] {
    /* Light Mode - Paper & Black */
    --bg-color: #fdfdfa;
    --text-color: #000000;
    --border-color: rgba(0, 0, 0, 0.1);
    --accent-color: #8c7851;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 3rem;
}

.logo {
    font-family: var(--font-serif);
    font-weight: 900;
    font-size: 1.2rem;
    letter-spacing: 3px;
    text-transform: uppercase;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    font-size: 0.7rem;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--text-color);
}

/* Main Content */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.main-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 10vw, 5rem);
    font-weight: 400;
    line-height: 1;
    margin-bottom: 1rem;
}

.main-title i {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
}

.subtitle {
    font-size: 0.9rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent-color);
    opacity: 1;
    margin-bottom: 4rem;
}

/* Input Section */
.input-section {
    width: 100%;
    max-width: 440px;
    margin-bottom: 4rem;
}

.input-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-group.secondary {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 2.5rem;
}

.field-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.field-wrapper label {
    font-size: 0.7rem;
    letter-spacing: 1px;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

input {
    width: 100%;
    background: var(--input-bg);
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 1rem 0.5rem;
    text-align: center;
    font-size: 1.1rem;
    font-family: var(--font-sans); /* 숫자가 올드해보이지 않게 모던한 산세리프로 변경 */
    font-weight: 300;
    outline: none;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

input::-webkit-input-placeholder {
    color: var(--accent-color) !important;
    opacity: 1 !important;
    -webkit-text-fill-color: var(--accent-color) !important;
    font-size: 0.9rem;
}

input::-moz-placeholder {
    color: var(--accent-color) !important;
    opacity: 1 !important;
    font-size: 0.9rem;
}

input:-ms-input-placeholder {
    color: var(--accent-color) !important;
    opacity: 1 !important;
    font-size: 0.9rem;
}

input::placeholder {
    color: var(--accent-color) !important;
    opacity: 1 !important;
    -webkit-text-fill-color: var(--accent-color) !important;
    font-size: 0.9rem;
}

input:focus {
    border-bottom-color: var(--text-color);
    transform: translateY(-2px);
}

.action-btn {
    width: 100%;
    background: #000000;
    color: #ffffff;
    border: 1px solid #ffffff;
    padding: 1.5rem;
    font-size: 1rem;
    font-family: var(--font-serif);
    font-weight: 700;
    letter-spacing: 3px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.action-btn:hover {
    letter-spacing: 5px;
    background: #ffffff;
    color: #000000;
}

/* Display Area */
#display-area {
    width: 100%;
    min-height: 300px;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 3rem;
}

.placeholder-text {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--accent-color);
    opacity: 1;
    text-transform: uppercase;
}

/* Fortune Result Style */
.fortune-container {
    animation: fadeIn 1s ease-out;
}

.fortune-meta {
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.fortune-result {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    line-height: 1.4;
    font-weight: 400;
    margin-bottom: 2rem;
    word-break: keep-all;
    cursor: pointer;
}

.menu-content {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px dashed var(--border-color);
    animation: slideUp 0.8s ease-out;
}

.menu-label {
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0.5;
    margin-bottom: 1rem;
    display: block;
}

.menu-name {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-style: italic;
    color: var(--accent-color);
}

.menu-decoration {
    margin-top: 1rem;
    font-size: 1.5rem;
    opacity: 0.3;
}

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

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

/* Footer */
footer {
    padding-top: 4rem;
    text-align: center;
}

.footer-line {
    width: 40px;
    height: 1px;
    background: var(--text-color);
    margin: 0 auto 1.5rem;
    opacity: 0.5;
}

footer p {
    font-size: 0.6rem;
    letter-spacing: 2px;
    opacity: 0.4;
}

/* Responsive */
@media (max-width: 600px) {
    .main-title { font-size: 3rem; }
    .app-container { padding: 1.5rem; }
}