:root {
    --primary: #408A71;
    --primary-hover: #285A48;
    --primary-light: rgba(64, 138, 113, 0.12);
    --primary-glow: rgba(64, 138, 113, 0.3);
    --bg-gradient: linear-gradient(135deg, #091413 0%, #162f25 40%, #285A48 100%);
    --surface: rgba(176, 228, 204, 0.06);
    --surface-solid: rgba(9, 20, 19, 0.85);
    --surface-hover: rgba(176, 228, 204, 0.12);
    --text-main: #ffffff;
    --text-muted: #B0E4CC;
    --border: rgba(176, 228, 204, 0.15);
    --border-bright: rgba(176, 228, 204, 0.3);
    --shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
    --accent-green: #408A71;
    --accent-amber: #F59E0B;
    --accent-red: #EF4444;
    --accent-cyan: #B0E4CC;
    --accent-pink: #EC4899;
    --accent-violet: #285A48;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 1.5rem;
}

/* ──────────── App Container ──────────── */
.app-container {
    background: var(--surface-solid);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-radius: 24px;
    box-shadow: var(--shadow), 0 0 80px rgba(79, 70, 229, 0.06);
    width: 100%;
    max-width: 900px;
    padding: 0;
    border: 1px solid var(--border);
    animation: fadeIn 0.6s ease-out;
    overflow: hidden;
}

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

/* ──────────── Navigation Bar ──────────── */
.nav-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border);
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    border: 1px solid transparent;
    border-radius: 50px;
    background: transparent;
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-tab::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary), var(--accent-violet));
    opacity: 0;
    transition: opacity var(--transition);
    z-index: 0;
}

.nav-tab span,
.nav-tab svg {
    position: relative;
    z-index: 1;
}

.nav-tab:hover {
    color: var(--text-main);
    border-color: var(--border-bright);
    background: var(--surface-hover);
}

.nav-tab.active {
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 20px rgba(64, 138, 113, 0.35);
}

.nav-tab.active::before {
    opacity: 1;
}

.nav-tab svg {
    width: 18px;
    height: 18px;
}

/* ──────────── Nav Profile Dropdown ──────────── */
.nav-profile-wrapper {
    position: relative;
    margin-left: auto;
    display: flex;
    align-items: center;
}

.nav-profile-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-bright);
    background: linear-gradient(135deg, var(--primary), var(--accent-violet));
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
    position: relative;
    box-shadow: 0 2px 12px rgba(64, 138, 113, 0.25);
}

.nav-profile-btn:hover {
    border-color: var(--primary);
    transform: scale(1.08);
    box-shadow: 0 4px 20px rgba(64, 138, 113, 0.4);
}

.nav-profile-btn.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow), 0 4px 20px rgba(64, 138, 113, 0.4);
}

.nav-profile-avatar {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    text-transform: uppercase;
    line-height: 1;
    pointer-events: none;
    user-select: none;
}

/* ── Dropdown Panel ── */
.nav-profile-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 260px;
    background: rgba(12, 24, 22, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-bright);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55), 0 0 40px rgba(64, 138, 113, 0.08);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.97);
    transform-origin: top right;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    overflow: hidden;
}

.nav-profile-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.nav-profile-dropdown-header {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.15rem 1.25rem;
}

.nav-profile-dropdown-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent-violet));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 2px 10px rgba(64, 138, 113, 0.3);
}

.nav-profile-dropdown-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
}

.nav-profile-dropdown-name {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-main);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-profile-dropdown-email {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-profile-dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 0 0.75rem;
}

.nav-profile-dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.85rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--accent-red);
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-profile-dropdown-item:hover {
    background: rgba(239, 68, 68, 0.08);
    color: #f87171;
}

.nav-profile-dropdown-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ──────────── Page Sections ──────────── */
.page-section {
    padding: 2rem 2.5rem 2.5rem;
    display: none;
    animation: pageFadeIn 0.4s ease-out;
}

.page-section.active {
    display: block;
}

@keyframes pageFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ──────────── Header ──────────── */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ──────────── Upload Section ──────────── */
.upload-section {
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--surface);
    margin-bottom: 2rem;
}

.upload-section:hover, .upload-section.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 30px rgba(79, 70, 229, 0.1);
}

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

.upload-content h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.upload-content p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.hidden {
    display: none !important;
}

/* ──────────── Controls Section ──────────── */
.controls-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ──────────── Size Selector ──────────── */
.size-selector-group {
    grid-column: 1 / -1;
}

.size-options {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.size-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
}

.size-btn:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.2);
}

.size-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.size-icon {
    font-size: 1.5rem;
}

.size-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-main);
}

.size-dim {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
}

input[type=range] {
    width: 100%;
    accent-color: var(--primary);
    background: transparent;
}

/* ──────────── Preview Section ──────────── */
.preview-section {
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.preview-section h3 {
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.canvas-container {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-bottom: 2rem;
    overflow: auto;
    display: flex;
    justify-content: center;
    border: 1px solid var(--border);
}

#preview-canvas {
    max-width: 100%;
    height: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    background: #FFF;
    border-radius: 4px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--accent-violet));
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Inter', sans-serif;
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.35);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(79, 70, 229, 0.5);
}

.primary-btn:active {
    transform: scale(0.98);
}

.primary-btn svg {
    width: 22px;
    height: 22px;
}


/* ═══════════════════════════════════════════════════════
   AI ENHANCER PAGE STYLES
   ═══════════════════════════════════════════════════════ */

/* ──────────── Settings Panel ──────────── */
.settings-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.settings-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent-cyan), var(--accent-violet));
}

.settings-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.settings-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
}

.settings-title svg {
    width: 20px;
    height: 20px;
    color: var(--accent-cyan);
}

.settings-status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    transition: var(--transition);
}

.settings-status.saved {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.settings-status.unsaved {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent-amber);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.setting-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.setting-field.full-width {
    grid-column: 1 / -1;
}

.setting-field label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-field select,
.setting-field input[type="text"],
.setting-field input[type="password"] {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    transition: var(--transition);
    outline: none;
}

.setting-field select:focus,
.setting-field input[type="text"]:focus,
.setting-field input[type="password"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.setting-field select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239B9BB4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

.provider-badge {
    display: flex;
    align-items: center;
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-main);
    font-weight: 500;
}

.setting-field select option {
    background: #1e1e3e;
    color: var(--text-main);
}

/* ──────────── Searchable Dropdown ──────────── */
.searchable-dropdown {
    position: relative;
}

.dropdown-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
    text-align: left;
}

.dropdown-trigger:hover {
    border-color: var(--border-bright);
}

.dropdown-trigger:focus,
.searchable-dropdown.open .dropdown-trigger {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.dropdown-trigger-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.dropdown-trigger-text.placeholder {
    color: var(--text-muted);
}

.dropdown-arrow {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform var(--transition);
}

.searchable-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-panel {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: rgba(22, 22, 50, 0.98);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-bright);
    border-radius: var(--radius-sm);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    z-index: 100;
    overflow: hidden;
    animation: dropdownSlideIn 0.2s ease-out;
}

@keyframes dropdownSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-search-wrap {
    position: relative;
    padding: 0.6rem;
    border-bottom: 1px solid var(--border);
}

.dropdown-search-icon {
    position: absolute;
    left: 1.1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

.dropdown-search {
    width: 100%;
    padding: 0.55rem 0.75rem 0.55rem 2.2rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition);
}

.dropdown-search:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.dropdown-search::placeholder {
    color: var(--text-muted);
}

.dropdown-list {
    max-height: 280px;
    overflow-y: auto;
    padding: 0.35rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

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

.dropdown-list::-webkit-scrollbar-track {
    background: transparent;
}

.dropdown-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 3px;
}

.dropdown-list::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    font-size: 0.84rem;
    color: var(--text-main);
    border: none;
    background: none;
    width: 100%;
    font-family: 'Inter', sans-serif;
    text-align: left;
}

.dropdown-item:hover {
    background: rgba(79, 70, 229, 0.12);
}

.dropdown-item.selected {
    background: rgba(79, 70, 229, 0.18);
    color: #fff;
}

.dropdown-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.dropdown-item-tag {
    flex-shrink: 0;
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.dropdown-item-tag.free {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-green);
    border-color: rgba(16, 185, 129, 0.2);
}

.dropdown-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.spinner-ring.small {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.dropdown-empty {
    padding: 1.25rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.dropdown-model-count {
    padding: 0.4rem 0.75rem;
    font-size: 0.72rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    text-align: center;
}

.api-key-wrapper {
    position: relative;
    display: flex;
    gap: 0;
}

.api-key-wrapper input {
    border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important;
    flex: 1;
}

.api-key-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.85rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-left: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.api-key-toggle:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.api-key-toggle svg {
    width: 18px;
    height: 18px;
}

.settings-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
}

.btn-save-settings {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-green), #059669);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-save-settings:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-save-settings:active {
    transform: scale(0.97);
}

.btn-save-settings svg {
    width: 16px;
    height: 16px;
}

/* ──────────── AI Upload Section ──────────── */
.ai-upload-section {
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--surface);
    margin-bottom: 2rem;
}

.ai-upload-section:hover, .ai-upload-section.dragover {
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.05);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.08);
}

.ai-upload-section .upload-icon {
    color: var(--accent-cyan);
}

/* ──────────── Before / After Preview ──────────── */
.preview-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 2rem;
    animation: pageFadeIn 0.4s ease-out;
}

.preview-pane {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
}

.preview-pane-label {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.3rem 0.75rem;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    z-index: 2;
    backdrop-filter: blur(8px);
}

.preview-pane-label.original {
    background: rgba(0, 0, 0, 0.5);
    color: var(--text-muted);
}

.preview-pane-label.enhanced {
    background: rgba(79, 70, 229, 0.6);
    color: #fff;
}

.preview-pane img {
    width: 100%;
    height: 260px;
    object-fit: contain;
    display: block;
    background: rgba(0, 0, 0, 0.3);
    padding: 0.5rem;
}

.preview-pane .placeholder-img {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 260px;
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ──────────── AI Skills Grid ──────────── */
.skills-section {
    margin-bottom: 2rem;
}

.skills-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.skill-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
}

.skill-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition);
    z-index: 0;
    border-radius: var(--radius);
}

.skill-card:nth-child(1)::before { background: linear-gradient(135deg, rgba(79, 70, 229, 0.12), rgba(139, 92, 246, 0.06)); }
.skill-card:nth-child(2)::before { background: linear-gradient(135deg, rgba(6, 182, 212, 0.12), rgba(16, 185, 129, 0.06)); }
.skill-card:nth-child(3)::before { background: linear-gradient(135deg, rgba(236, 72, 153, 0.12), rgba(239, 68, 68, 0.06)); }
.skill-card:nth-child(4)::before { background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(239, 68, 68, 0.06)); }
.skill-card:nth-child(5)::before { background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(6, 182, 212, 0.06)); }
.skill-card:nth-child(6)::before { background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(236, 72, 153, 0.06)); }

.skill-card:hover::before {
    opacity: 1;
}

.skill-card:hover {
    border-color: var(--border-bright);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.skill-card.active-skill {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow), 0 8px 24px rgba(0, 0, 0, 0.2);
}

.skill-card.processing {
    pointer-events: none;
    opacity: 0.75;
    animation: skillPulse 1.5s ease-in-out infinite;
}

@keyframes skillPulse {
    0%, 100% { opacity: 0.75; }
    50% { opacity: 0.55; }
}

.skill-card.active-skill:not(.processing) {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25), 0 8px 24px rgba(0, 0, 0, 0.2);
}

.skill-card > * {
    position: relative;
    z-index: 1;
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: 0.6rem;
    display: block;
}

.skill-name {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-main);
    margin-bottom: 0.3rem;
}

.skill-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Skill loading spinner overlay */
.skill-spinner {
    display: none;
    position: absolute;
    inset: 0;
    background: rgba(15, 12, 41, 0.8);
    backdrop-filter: blur(4px);
    z-index: 5;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

.skill-card.processing .skill-spinner {
    display: flex;
}

.spinner-ring {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ──────────── Custom AI Prompt Section ──────────── */
.custom-prompt-section {
    margin-bottom: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    animation: pageFadeIn 0.4s ease-out;
}

.custom-prompt-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--primary), var(--accent-pink));
}

.custom-prompt-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.custom-prompt-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.custom-prompt-input-wrap {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.custom-prompt-textarea {
    flex: 1;
    padding: 0.8rem 1rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    line-height: 1.5;
    resize: vertical;
    outline: none;
    transition: var(--transition);
    min-height: 60px;
}

.custom-prompt-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.custom-prompt-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.btn-custom-prompt-submit {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 18px rgba(6, 182, 212, 0.3);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-custom-prompt-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(6, 182, 212, 0.45);
}

.btn-custom-prompt-submit:active {
    transform: scale(0.97);
}

.btn-custom-prompt-submit:disabled {
    opacity: 0.5;
    pointer-events: none;
}

.btn-custom-prompt-submit svg {
    width: 18px;
    height: 18px;
}

/* ──────────── Action Bar ──────────── */
.action-bar {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.8rem 1.75rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-action svg {
    width: 20px;
    height: 20px;
}

.btn-save-photo {
    background: linear-gradient(135deg, var(--primary), var(--accent-violet));
    color: #fff;
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.35);
}

.btn-save-photo:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(79, 70, 229, 0.5);
}

.btn-save-photo:active {
    transform: scale(0.97);
}

.btn-reset {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.btn-reset:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border-color: var(--border-bright);
}

/* ──────────── Toast Notification ──────────── */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(120px);
    padding: 0.85rem 1.75rem;
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 9999;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(12px);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: rgba(16, 185, 129, 0.9);
    box-shadow: 0 8px 30px rgba(16, 185, 129, 0.3);
}

.toast.error {
    background: rgba(239, 68, 68, 0.9);
    box-shadow: 0 8px 30px rgba(239, 68, 68, 0.3);
}

.toast.info {
    background: rgba(79, 70, 229, 0.9);
    box-shadow: 0 8px 30px rgba(79, 70, 229, 0.3);
}

/* ──────────── Responsive ──────────── */
@media (max-width: 640px) {
    body {
        padding: 0.5rem;
    }

    .app-container {
        border-radius: 16px;
    }

    .page-section {
        padding: 1.5rem 1.25rem;
    }

    .nav-bar {
        padding: 0.75rem 1rem;
    }

    .nav-tab {
        padding: 0.5rem 1rem;
        font-size: 0.82rem;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .preview-compare {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 1.35rem;
    }
}