:root {
    /* Light Mode */
    --primary-color: #6D5D6E;
    --secondary-color: #F4EEE0;
    --accent-color: #D6A4A4;
    --text-dark: #393646;
    --text-light: #6D5D6E;
    --white: #FFFFFF;
    --bg-container: #FFFFFF;
    --bg-upload-box: #FFFFFF;
    --bg-ad: #f0f0f0;
    --border-upload: #ddd;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --border-radius: 20px;
    --font-main: 'Noto Serif KR', serif;
    --font-sans: 'Poppins', sans-serif;
}

[data-theme="dark"] {
    --primary-color: #A084E8;
    --secondary-color: #1A1A1A;
    --accent-color: #6F61C0;
    --text-dark: #F5F5F5;
    --text-light: #B0B0B0;
    --white: #2D2D2D;
    --bg-container: #242424;
    --bg-upload-box: #2D2D2D;
    --bg-ad: #333333;
    --border-upload: #444444;
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--secondary-color);
    color: var(--text-dark);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 480px;
    background: var(--bg-container);
    min-height: 100vh;
    position: relative;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: background-color 0.3s ease;
}

/* Theme Toggle */
.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 100;
}

#theme-btn {
    background: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    color: var(--text-dark);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

/* Sections */
section {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.4s ease-in-out, opacity 0.4s ease-in-out, background-color 0.3s ease;
    opacity: 0;
    pointer-events: none;
    transform: translateX(50px);
    background: var(--bg-container);
    overflow-y: auto;
}

section.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
    z-index: 10;
}

/* Landing Page */
#landing-page {
    justify-content: center;
    text-align: center;
}

.header {
    margin-bottom: 2rem;
}

.badge {
    background-color: var(--primary-color);
    color: #FFFFFF;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1rem;
}

h1 {
    font-family: var(--font-main);
    font-size: 2.5rem;
    line-height: 1.3;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

.hero-image-placeholder {
    width: 200px;
    height: 200px;
    background: var(--white);
    border-radius: 50%;
    margin: 2rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.hero-image-placeholder i {
    font-size: 5rem;
    color: var(--text-light);
    opacity: 0.3;
}

.face-scan-effect {
    position: absolute;
    width: 100%;
    height: 4px;
    background: var(--accent-color);
    top: 0;
    animation: scan 2s infinite ease-in-out;
    opacity: 0.6;
    box-shadow: 0 0 10px var(--accent-color);
}

@keyframes scan {
    0% { top: 0%; opacity: 0; }
    30% { opacity: 1; }
    70% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.cta-button {
    width: 100%;
    padding: 1.2rem;
    border: none;
    border-radius: 15px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
    font-family: var(--font-sans);
}

.cta-button.primary {
    background-color: var(--primary-color);
    color: #FFFFFF;
    box-shadow: 0 5px 15px rgba(109, 93, 110, 0.3);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(109, 93, 110, 0.4);
}

.cta-button.secondary {
    background-color: var(--accent-color);
    color: #FFFFFF;
}

.cta-button.outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.note {
    font-size: 0.8rem;
    color: var(--text-light);
    opacity: 0.7;
    margin-top: 1rem;
}

/* Upload Page */
.nav-bar {
    width: 100%;
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
}

.back-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    margin-right: 1rem;
}

.nav-bar span {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.upload-box {
    border: 3px dashed var(--border-upload);
    border-radius: var(--border-radius);
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    width: 100%;
    background: var(--bg-upload-box);
}

.upload-box:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-ad);
}

.upload-box i {
    font-size: 3rem;
    color: var(--text-light);
    opacity: 0.5;
    margin-bottom: 1rem;
}

.upload-box p {
    color: var(--text-dark);
}

.upload-box span.sub-text {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

#preview-container {
    width: 100%;
    margin-bottom: 2rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow);
    display: none;
}

#preview-container.hidden {
    display: none;
}
#preview-container:not(.hidden) {
    display: block;
}

#image-preview {
    width: 100%;
    display: block;
}

.scan-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, rgba(214, 164, 164, 0.2), transparent);
    animation: scanOverlay 1.5s infinite linear;
    display: none;
}

@keyframes scanOverlay {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.hidden {
    display: none !important;
}

/* Loading Page */
#loading-page {
    justify-content: center;
}

.loader-content {
    text-align: center;
    margin-bottom: 3rem;
}

.scanner {
    width: 80px;
    height: 80px;
    border: 5px solid var(--white);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

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

#loading-text {
    margin-top: 1rem;
    color: var(--text-light);
    font-style: italic;
}

/* Result Page */
#result-page {
    padding-top: 3rem;
}

.result-card {
    width: 100%;
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    text-align: center;
}

.result-header {
    margin-bottom: 1.5rem;
}

#result-title {
    font-family: var(--font-main);
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.result-img-container {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    overflow: hidden;
    position: relative;
    border: 5px solid var(--secondary-color);
}

#result-user-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.result-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(109, 93, 110, 0.8);
    color: white;
    padding: 0.3rem;
    font-size: 0.9rem;
}

.result-description {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.data-bars {
    text-align: left;
}

.bar-item {
    margin-bottom: 1rem;
}

.bar-item span {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
}

.progress-bg {
    width: 100%;
    height: 10px;
    background-color: var(--secondary-color);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-color);
    border-radius: 5px;
    width: 0;
    transition: width 1s ease-out;
}

.ad-banner {
    width: 100%;
    background-color: var(--bg-ad);
    border: 1px solid var(--border-upload);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    padding: 1rem;
    font-size: 0.8rem;
    border-radius: 10px;
}

.ad-banner.large {
    height: 100px;
}

.action-buttons {
    width: 100%;
}