/* ===== Theme variables ===== */
:root {
    --bg: #f5f7fb;
    --surface: rgba(255, 255, 255, 0.8);
    --surface-secondary: rgba(249, 250, 252, 0.9);
    --text: #1a1e2b;
    --text-secondary: #4a5568;
    --border: rgba(238, 242, 246, 0.5);
    --border-strong: #e2e8f0;
    --accent: #6366f1;
    --accent-hover: #4f52e0;
    --success: #10b981;
    --error: #e53e3e;
    --tag-bg: #eef2f6;
    --tag-text: #2d3748;
    --tag-hover: #e2e8f0;
    --progress-bg: #e2e8f0;
    --tooltip-bg: #1e293b;
    --tooltip-text: #f1f5f9;
    --modal-overlay: rgba(0, 0, 0, 0.5);
}

body.dark {
    --bg: #0f1117;
    --surface: rgba(26, 30, 43, 0.9);
    --surface-secondary: rgba(35, 40, 56, 0.95);
    --text: #e2e8f0;
    --text-secondary: #a0aec0;
    --border: rgba(45, 55, 72, 0.5);
    --border-strong: #4a5568;
    --accent: #8183f0;
    --accent-hover: #9b9df5;
    --success: #2ecc71;
    --error: #f56565;
    --tag-bg: #2d3748;
    --tag-text: #cbd5e0;
    --tag-hover: #4a5568;
    --progress-bg: #2d3748;
    --tooltip-bg: #334155;
    --tooltip-text: #f8fafc;
}

* {
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
    color: var(--text);
}

body {
    background: var(--bg);
    margin: 0;
    min-height: 100vh;
    padding: 16px;
    backdrop-filter: blur(10px);
}

/* ===== Login Page ===== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
    padding: 20px;
}

.login-card {
    background: var(--surface);
    backdrop-filter: blur(15px);
    border-radius: 32px;
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    text-align: center;
}

.login-card h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--text);
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.login-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 40px;
    padding: 14px 28px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.4);
}

.login-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.error-message {
    color: var(--error);
    margin-top: 15px;
    font-size: 0.9rem;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.checkbox-row input {
    width: auto;
}

/* ===== Main App ===== */
.app-container {
    max-width: 1600px;
    margin: 0 auto;
    background: var(--surface);
    backdrop-filter: blur(15px);
    border-radius: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 24px;
    border: 1px solid var(--border);
}

.main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.main-header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle,
.icon-btn {
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: 40px;
    padding: 8px 18px;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(5px);
}

.icon-btn {
    padding: 8px 12px;
    font-size: 1.2rem;
}

.model-status {
    font-size: 0.95rem;
    color: var(--text-secondary);
    background: var(--surface-secondary);
    padding: 8px 16px;
    border-radius: 40px;
    border: 1px solid var(--border);
}

/* ===== Main layout ===== */
.main-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
}

/* ===== Settings column ===== */
.settings-column {
    background: var(--surface-secondary);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-strong);
    padding-bottom: 10px;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 8px 20px;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 40px;
    transition: 0.2s;
}

.tab-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 5px 10px rgba(99, 102, 241, 0.3);
}

.input-group {
    margin-bottom: 18px;
    position: relative;
}

label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

input,
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    font-size: 0.95rem;
    background: var(--surface);
    color: var(--text);
    backdrop-filter: blur(5px);
    transition: 0.2s;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.row {
    display: flex;
    gap: 12px;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.aspect-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.aspect-btn {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 40px;
    padding: 8px 18px;
    cursor: pointer;
    color: var(--text);
    backdrop-filter: blur(5px);
}

.aspect-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    box-shadow: 0 5px 10px rgba(99, 102, 241, 0.3);
}

.enhance-btn {
    margin-top: 8px;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 40px;
    padding: 8px 16px;
    cursor: pointer;
    color: var(--text);
    font-size: 0.9rem;
}

/* Advanced & LoRA sections */
details {
    margin: 20px 0;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 8px 16px;
    background: var(--surface);
    backdrop-filter: blur(5px);
}

details summary {
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
}

.tag-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-height: 150px;
    overflow-y: auto;
    padding: 8px 0;
}

.tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    padding: 6px 14px;
    border-radius: 40px;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid transparent;
    white-space: nowrap;
    transition: 0.1s;
}

.tag:hover {
    background: var(--tag-hover);
    border-color: var(--accent);
    transform: scale(1.02);
}

/* Custom dropdown for styles */
.custom-dropdown {
    position: relative;
    width: 100%;
}

.dropdown-button {
    width: 100%;
    padding: 12px 16px;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    color: var(--text);
    font-size: 0.95rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dropdown-arrow {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    margin-top: 4px;
    padding: 8px 0;
    z-index: 1000;
    display: none;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--border);
}

.dropdown-menu.show {
    display: block;
}

.dropdown-menu::-webkit-scrollbar {
    width: 6px;
}

.dropdown-menu::-webkit-scrollbar-track {
    background: var(--border);
    border-radius: 10px;
}

.dropdown-menu::-webkit-scrollbar-thumb {
    background: var(--accent);
    border-radius: 10px;
}

.dropdown-item {
    padding: 10px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.1s;
}

.dropdown-item:hover {
    background: var(--surface-secondary);
}

.style-thumbnail {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-strong);
    cursor: pointer;
}

/* Modern slider */
.modern-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 5px;
    background: var(--progress-bg);
    outline: none;
}

.modern-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.modern-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    background: var(--surface);
    cursor: pointer;
    transition: 0.2s;
}

.dropzone:hover {
    border-color: var(--accent);
    background: var(--surface-secondary);
}

.dropzone-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.generate-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    border: none;
    border-radius: 40px;
    padding: 16px 28px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
    box-shadow: 0 10px 20px -5px rgba(99, 102, 241, 0.4);
    transition: 0.2s;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -5px rgba(99, 102, 241, 0.5);
}

/* ===== Image column ===== */
.image-column {
    background: var(--surface-secondary);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    padding: 24px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 500px;
    position: relative;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
}

.reference-preview {
    width: 100%;
    margin-bottom: 20px;
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.reference-preview img {
    width: 100%;
    max-height: 200px;
    object-fit: contain;
    background: var(--surface);
}

.remove-reference {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-image {
    color: var(--text-secondary);
    font-size: 1.2rem;
    text-align: center;
    padding: 60px 20px;
    opacity: 0.7;
}

.progress-area {
    width: 100%;
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--progress-bg);
    border-radius: 20px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-hover));
    width: 0%;
    transition: width 0.2s;
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 20px;
    margin-top: 15px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.result-image {
    max-width: 100%;
    max-height: 500px;
    border-radius: 24px;
    box-shadow: 0 20px 30px -5px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--surface);
}

.download-btn {
    display: inline-block;
    margin-top: 16px;
    padding: 12px 28px;
    background: var(--success);
    color: white;
    border-radius: 40px;
    text-decoration: none;
    font-weight: 500;
    box-shadow: 0 5px 10px rgba(16, 185, 129, 0.3);
}

.elapsed-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 5px 0;
}

/* ===== Custom tooltip ===== */
.custom-tooltip {
    position: fixed;
    background: var(--tooltip-bg);
    color: var(--tooltip-text);
    padding: 8px 14px;
    border-radius: 12px;
    font-size: 0.85rem;
    max-width: 300px;
    word-wrap: break-word;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    z-index: 10000;
    transition: opacity 0.15s;
    opacity: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
}

.custom-tooltip::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 12px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--tooltip-bg);
}

.custom-tooltip img {
    max-width: 200px;
    max-height: 200px;
    border-radius: 8px;
    display: block;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background: var(--modal-overlay);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--surface);
    margin: 5% auto;
    padding: 30px;
    border-radius: 24px;
    max-width: 500px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    color: var(--text);
}

.close {
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 40px;
    padding: 12px 24px;
    font-size: 1rem;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
}