/* Dark Theme Base */
:root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #252525;
    --text-primary: #e0e0e0;
    --text-secondary: #a1a1a1;
    --accent-color: #17d0d0;
    --accent-hover: #00FFFF;
    --border-color: #333;
    --delete-red: #ef4444;
    --delete-red-hover: #7f1d1d;
    --footer-color: #fff;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 1rem; /* Reduced space */
    padding-top: 0.5rem;
}

.logo {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--accent-color);
    margin: 0;
    letter-spacing: -0.5px;
}

.tagline-container {
    margin: 0.25rem 0 0; /* Reduced space */
    overflow: hidden;
    position: relative;
}

.tagline {
    font-size: 1.1rem;
    font-weight: 400;
    margin: 0;
    background: linear-gradient(90deg, 
        #00ffff, 
        #0080ff, 
        #0055ff, 
        #00ffff);
    background-size: 300% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient 4s linear infinite;
    text-shadow: 0 0 8px rgba(0, 255, 255, 0.3);
}

@keyframes gradient {
    0% { background-position: 0% center; }
    100% { background-position: 300% center; }
}

/* Upload Area */
.upload-container {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: var(--bg-secondary);
}

.drop-zone:hover {
    border-color: var(--accent-color);
    background-color: var(--bg-tertiary);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 300;
}

/* Preview Area */
.preview-container {
    width: 100%;
    margin-top: 0.5rem; /* Reduced space */
    flex: 1;
    display: flex;
    flex-direction: column;
}

.result-header {
    text-align: center;
    margin-bottom: 0.5rem; /* Reduced space */
}

.result-notice {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
    font-weight: 300;
}

/* Image Comparison */
.image-comparison {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    flex: 1;
}

@media (min-width: 768px) {
    .image-comparison {
        flex-direction: row;
        gap: 1.5rem;
    }
}

.image-column {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.image-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 0.5rem;
    margin-bottom: 0.5rem;
    height: 40px;
}

.delete-btn {
    padding: 0.5rem;
    background-color: var(--bg-tertiary);
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.delete-btn:hover {
    background-color: var(--delete-red-hover);
}

.delete-icon {
    width: 20px;
    height: 20px;
    color: var(--delete-red);
}

.delete-btn-placeholder {
    width: 32px;
    visibility: hidden;
}

.image-box {
    background-color: var(--bg-secondary);
    border-radius: 6px;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid var(--border-color);
    position: relative;
    min-height: 300px;
}

.placeholder-content {
    text-align: center;
    padding: 1rem;
}

.placeholder-icon {
    width: 48px;
    height: 48px;
    color: var(--border-color);
    opacity: 0.7;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.process-btn {
    background-color: var(--accent-color);
    color: var(--bg-tertiary);
    border: none;
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 180px;
}

.process-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.process-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.download-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-tertiary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 180px;
}

.download-btn:hover {
    background-color: #0ad911;
    transform: translateY(-1px);
}

.download-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Image Styles */
.preview-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem 0;
    color: var(--footer-color);
    font-size: 0.85rem;
    font-weight: 300;
}

.github {
    color: var(--footer-color);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.github:hover {
    color: var(--accent-hover);
}

.github:visited {
    color: var(--footer-color);
}

.kd-resume {
    color: var(--footer-color);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.kd-resume:hover {
    color: var(--accent-hover);
}

.kd-resume:visited {
    color: var(--footer-color);
}

/* Utility Classes */
.hidden {
    display: none;
}

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

.loading-spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top: 3px solid var(--accent-color);
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}