/* ============================================
   SERVERLESS IMAGE HOSTER - STYLESHEET
   ============================================ */

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

:root {
    --primary-color: #1e90ff;
    --primary-hover: #1a7dd9;
    --background: #000000;
    --surface: #0a0a0a;
    --border-color: #ffffff;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-light: #808080;
    --success: #10b981;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px rgba(255, 255, 255, 0.05);
    --shadow-md: 0 4px 6px rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 10px 15px rgba(255, 255, 255, 0.1);
    --transition: all 0.2s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    background: var(--background);
    color: var(--text-primary);
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 50px;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
    padding: 40px 0;
}

/* ============================================
   UPLOAD SECTION
   ============================================ */

.upload-section {
    margin-bottom: 50px;
}

.upload-box {
    background: var(--surface);
    border: 1px solid var(--border-color);
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-box:hover {
    border-color: var(--primary-color);
    background: rgba(30, 144, 255, 0.02);
}

.upload-box.dragover {
    background: rgba(30, 144, 255, 0.05);
    border-color: var(--primary-color);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    animation: float 3s ease-in-out infinite;
}

.upload-box h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.upload-box p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

.file-input {
    display: none;
}

.upload-button {
    background: var(--primary-color);
    color: var(--background);
    border: 1px solid var(--border-color);
    padding: 12px 35px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.upload-button:hover {
    background: var(--primary-hover);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.upload-button:active {
    transform: scale(0.98);
}

/* ============================================
   STATS SECTION
   ============================================ */

.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
}

.stat-card {
    background: var(--surface);
    padding: 30px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--primary-color);
    background: rgba(30, 144, 255, 0.02);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   GALLERY SECTION
   ============================================ */

.gallery-section {
    margin-bottom: 50px;
}

.gallery-title {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--text-primary);
    font-weight: 700;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 1.1rem;
}

/* ============================================
   GALLERY ITEM
   ============================================ */

.gallery-item {
    background: var(--surface);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    aspect-ratio: 1;
}

.gallery-item:hover {
    border-color: var(--primary-color);
    background: rgba(30, 144, 255, 0.05);
}

.gallery-item-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-item:hover .gallery-item-image {
    filter: brightness(0.7);
}

.gallery-item-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

.overlay-button {
    background: transparent;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    color: var(--text-primary);
}

.overlay-button:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--background);
}

.overlay-button.delete:hover {
    background: var(--error);
    border-color: var(--error);
}

.overlay-button.view:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease-in-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border-color);
    max-width: 600px;
    width: 100%;
    position: relative;
    overflow: hidden;
    animation: slideUp 0.3s ease-in-out;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--background);
}

#previewImage {
    width: 100%;
    height: auto;
    display: block;
}

.modal-info {
    padding: 25px;
}

#imageName {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
    word-break: break-all;
}

.image-url-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    margin-bottom: 15px;
    font-family: 'Courier New', monospace;
    background: var(--background);
    color: var(--text-secondary);
    transition: var(--transition);
}

.image-url-input:focus {
    outline: none;
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.copy-button {
    width: 100%;
    padding: 10px;
    background: var(--primary-color);
    color: var(--background);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.copy-button:hover {
    background: var(--primary-hover);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.copy-button:active {
    transform: scale(0.98);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 50px;
    font-size: 0.9rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .upload-box {
        padding: 35px 20px;
    }

    .upload-icon {
        font-size: 2.5rem;
    }

    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

    .stat-card {
        padding: 20px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .gallery-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .header {
        padding: 40px 15px;
        margin-bottom: 30px;
    }

    .logo {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 0.9rem;
    }

    .upload-box {
        padding: 25px 15px;
    }

    .upload-icon {
        font-size: 2rem;
    }

    .upload-box h2 {
        font-size: 1.2rem;
    }

    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 12px;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .modal-content {
        border-radius: 12px;
    }

    .modal-info {
        padding: 20px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.success {
    animation: slideUp 0.3s ease-in-out;
}

.error {
    border-color: var(--error) !important;
}