@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;700&display=swap');

:root {
    --primary-color: oklch(55% 0.2 260); /* Vibrant blue-purple */
    --secondary-color: oklch(70% 0.15 80); /* Warm yellow-orange */
    --background-color: oklch(98% 0.01 270); /* Light cool gray */
    --text-color: oklch(20% 0.02 270); /* Dark cool gray */
    --container-bg: #ffffff; /* Pure white */
    --input-bg: oklch(95% 0.05 260); /* Light pastel blue for inputs */
    --white: #fff; /* fallback for button text */
    --transition-speed: 0.4s;
    --shadow-strength: 0.08;
}

html[data-theme='dark'] {
    --primary-color: oklch(70% 0.25 280); /* Lighter, more saturated blue-purple for dark mode */
    --secondary-color: oklch(75% 0.18 90); /* Brighter yellow-orange */
    --background-color: oklch(15% 0.02 270); /* Dark background */
    --text-color: oklch(85% 0.01 270); /* Light text */
    --container-bg: oklch(25% 0.03 270); /* Darker container */
    --input-bg: oklch(30% 0.05 270); /* Dark pastel gray for inputs */
    --shadow-strength: 0.2;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--background-color);
    background-image: linear-gradient(135deg, var(--background-color) 0%, oklch(from var(--background-color) l c h+5) 100%);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh; /* Use min-height for content flexibility */
    margin: 0;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, background-image var(--transition-speed) ease;
    line-height: 1.6;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    width: 44px; /* Slightly larger */
    height: 44px; /* Slightly larger */
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.3rem; /* Larger icon */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, var(--shadow-strength)); /* Enhanced shadow */
}

.theme-toggle:hover, .header-btn:hover {
    background-color: var(--primary-color);
    color: var(--white); /* Ensure white text on hover */
    border-color: var(--primary-color);
    box-shadow: 0 6px 12px rgba(from var(--primary-color) r g b / var(--shadow-strength) * 1.5); /* Glowing effect */
}

.header-buttons {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 12px; /* Slightly more space */
    z-index: 1000; /* Ensure it stays on top */
}

.header-btn {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 0 18px; /* More padding */
    height: 44px;
    border-radius: 22px; /* Pill shape */
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, var(--shadow-strength)); /* Enhanced shadow */
}

#webcam-container {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

#label-container {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem; /* Slightly more space */
    color: var(--text-color);
    font-size: 1.25rem; /* Slightly larger */
    font-weight: 500;
}


.container {
    background-color: var(--container-bg);
    padding: 2.5rem; /* More padding */
    border-radius: 16px; /* Softer corners */
    box-shadow: 0 12px 24px rgba(0, 0, 0, var(--shadow-strength) * 1.2); /* Enhanced shadow */
    text-align: center;
    width: 90%;
    max-width: 450px; /* Slightly wider */
    transition: background-color var(--transition-speed) ease;
    position: relative; /* For z-index if needed */
    z-index: 1; /* To be above body background */
}

h1 {
    color: var(--primary-color);
    margin-bottom: 0.75rem; /* More space */
    font-size: 2.2rem; /* Larger heading */
    font-weight: 700; /* Bolder */
}

.subtitle {
    margin-bottom: 2.5rem; /* More space */
    font-size: 1.05rem; /* Slightly larger */
    color: var(--text-color);
    opacity: 0.8; /* Softer text */
}

.image-upload-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: 1.5rem; /* More space */
}

.image-upload-input {
    display: none;
}

.image-upload-label {
    cursor: pointer;
}

#image-preview-container {
    margin-top: 1.5rem; /* More space */
    display: flex;
    justify-content: center;
    min-height: 200px;
    background-color: oklch(from var(--background-color) l c h-2); /* Slight contrast */
    border-radius: 12px;
    padding: 1rem;
    box-shadow: inset 0 2px 4px rgba(0,0,0,var(--shadow-strength) * 0.5); /* Inner shadow */
}

#image-preview {
    max-width: 100%;
    max-height: 200px;
    display: none;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,var(--shadow-strength));
}

noscript {
    color: var(--text-color);
    font-size: 0.9rem;
    margin-top: 1rem;
    display: block;
}

.ads-container {
    margin-top: 3rem; /* More space */
    text-align: center;
}

#disqus_thread {
    margin-top: 3rem;
    padding: 1.5rem;
    border: 1px solid var(--text-color); /* Solid visual indicator */
    border-radius: 12px;
    min-height: 150px; /* Ensure visibility even if empty */
    background-color: oklch(from var(--container-bg) l-1 c h); /* Subtle background */
    display: flex; /* To center potential fallback content */
    align-items: center;
    justify-content: center;
    font-style: italic;
    color: oklch(from var(--text-color) l+20 c h);
}

#disqus_thread:empty::before {
    content: "Disqus 댓글이 로드되지 않았거나 아직 댓글이 없습니다. 브라우저 콘솔을 확인해주세요.";
    display: block;
    text-align: center;
    color: oklch(from var(--text-color) l+20 c h);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem; /* More space between form groups */
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem; /* More space */
    font-weight: 500; /* Less bold */
    color: var(--text-color);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: calc(100% - 24px); /* Adjust for padding and border */
    padding: 12px; /* More padding */
    border: 2px solid oklch(from var(--text-color) l c h+20); /* More prominent border */
    border-radius: 8px; /* Softer corners */
    background-color: var(--input-bg); /* Use pastel input background */
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: inset 0 1px 4px rgba(0,0,0,var(--shadow-strength) * 0.4); /* Stronger inner shadow */
}

.form-group input[type="text"]::placeholder,
.form-group input[type="email"]::placeholder,
.form-group textarea::placeholder {
    color: oklch(from var(--text-color) l+30 c h); /* Clearer placeholder text */
    opacity: 0.7; /* Ensure visibility */
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 4px rgba(from var(--primary-color) r g b / 0.4), inset 0 1px 4px rgba(0,0,0,var(--shadow-strength) * 0.6); /* More prominent focus ring */
}

.submit-btn {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 1rem 2.5rem; /* More padding */
    font-size: 1.05rem; /* Slightly larger */
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    margin-top: 1.8rem; /* More space */
    box-shadow: 0 6px 12px rgba(from var(--primary-color) r g b / var(--shadow-strength) * 1.5); /* Enhanced shadow */
    align-self: center;
    width: auto;
    font-weight: 600; /* Bolder text */
}

.submit-btn:hover {
    background-color: oklch(from var(--primary-color) l-5 c h); /* Slightly darker on hover */
    transform: translateY(-3px); /* More pronounced lift */
    box-shadow: 0 8px 16px rgba(from var(--primary-color) r g b / var(--shadow-strength) * 2);
}

.footer {
    margin-top: 4rem; /* More space from content */
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-color);
    font-size: 0.85rem;
    opacity: 0.7;
    line-height: 1.8;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer a:hover {
    text-decoration: underline;
}