/* =============================================================================
   PromoSnap User - Clean White Design System
   シンプルで清潔感のある白系デザイン
   ============================================================================= */

/* -----------------------------------------------------------------------------
   Fonts
   ----------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap');

/* -----------------------------------------------------------------------------
   CSS Variables
   ----------------------------------------------------------------------------- */
:root {
    /* Light Color Palette */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Accent Colors */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --primary-bg: #eff6ff;

    --success: #10b981;
    --success-bg: #ecfdf5;

    --warning: #f59e0b;
    --warning-bg: #fffbeb;

    --danger: #ef4444;
    --danger-bg: #fef2f2;

    --info: #06b6d4;
    --info-bg: #ecfeff;

    /* Typography */
    --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* -----------------------------------------------------------------------------
   Reset & Base
   ----------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* -----------------------------------------------------------------------------
   Layout
   ----------------------------------------------------------------------------- */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--gray-200);
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-lg) 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-lg);
}

.nav-section-title {
    padding: var(--space-sm) var(--space-xl);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--primary-bg);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ダッシュボードリンク */
.dashboard-link {
    margin: 0 var(--space-md) var(--space-lg) var(--space-md);
    padding: var(--space-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border-left: none;
}

.dashboard-link:hover {
    background: var(--primary-bg);
}

.dashboard-link.active {
    background: var(--primary);
    color: white;
    border-left: none;
}

/* ジャンルリンク（少しコンパクトに） */
.nav-link-genre {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.nav-link-genre svg {
    width: 16px;
    height: 16px;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Top Bar */
.topbar {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-name {
    font-weight: 500;
    color: var(--gray-700);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--space-xl);
}

/* -----------------------------------------------------------------------------
   Page Header
   ----------------------------------------------------------------------------- */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-xl);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-xs);
}

.page-subtitle {
    color: var(--gray-500);
    font-size: 0.95rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-top: var(--space-sm);
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

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

.breadcrumb-separator {
    color: var(--gray-300);
}

/* -----------------------------------------------------------------------------
   Cards
   ----------------------------------------------------------------------------- */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
}

.card-body {
    padding: var(--space-lg);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-200);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.85rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.05rem;
}

.btn-group {
    display: flex;
    gap: var(--space-md);
}

/* -----------------------------------------------------------------------------
   Forms
   ----------------------------------------------------------------------------- */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--space-sm);
}

.form-label .required {
    color: var(--danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--gray-900);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-hint {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: var(--space-xs);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-checkbox-label {
    font-size: 0.95rem;
    color: var(--gray-700);
}

/* -----------------------------------------------------------------------------
   Badges
   ----------------------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-primary {
    background: var(--primary-bg);
    color: var(--primary);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

/* -----------------------------------------------------------------------------
   Alerts
   ----------------------------------------------------------------------------- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
}

.alert svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert-success {
    background: var(--success-bg);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background: var(--danger-bg);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: var(--warning-bg);
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: var(--info-bg);
    color: #0e7490;
    border: 1px solid #a5f3fc;
}

/* -----------------------------------------------------------------------------
   Empty State
   ----------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-icon svg {
    width: 40px;
    height: 40px;
    color: var(--gray-400);
}

.empty-state-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-sm);
}

.empty-state-text {
    color: var(--gray-500);
    margin-bottom: var(--space-lg);
}

/* -----------------------------------------------------------------------------
   Login Page
   ----------------------------------------------------------------------------- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    padding: var(--space-xl);
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--gray-200);
}

.login-logo {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -1px;
    margin-bottom: var(--space-xs);
}

.login-logo p {
    color: var(--gray-500);
    font-size: 0.95rem;
}

.login-form {
    margin-top: var(--space-xl);
}

.login-form .btn-primary {
    width: 100%;
    padding: var(--space-md);
    font-size: 1rem;
    margin-top: var(--space-md);
}

/* -----------------------------------------------------------------------------
   Template Grid
   ----------------------------------------------------------------------------- */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.template-card {
    display: block;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
    transition: var(--transition-normal);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.template-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.template-image {
    aspect-ratio: 4/3;
    background: var(--gray-100);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.template-image img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.template-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-300);
}

.template-content {
    padding: var(--space-lg);
}

.template-genre {
    margin-bottom: var(--space-sm);
}

.template-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--space-md);
}

/* -----------------------------------------------------------------------------
   Generate Page
   ----------------------------------------------------------------------------- */
.generate-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    max-width: 1400px;
}

@media (max-width: 1024px) {
    .generate-grid {
        grid-template-columns: 1fr;
    }
}

.sample-image-container {
    aspect-ratio: 16/9;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.sample-image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.variable-section {
    margin-bottom: var(--space-xl);
}

.variable-section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-lg);
}

.variable-section-title svg {
    width: 20px;
    height: 20px;
}

.no-variables-notice {
    background: var(--info-bg);
    border: 1px solid #a5f3fc;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    color: #0e7490;
    margin-bottom: var(--space-xl);
}

/* Result Container */
.result-container {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--gray-200);
}

.result-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--success);
    margin-bottom: var(--space-md);
}

.result-title svg {
    width: 20px;
    height: 20px;
}

.generated-image-wrapper {
    border: 2px solid var(--success);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
}

.generated-image-wrapper img {
    width: 100%;
    display: block;
}

.image-actions {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

/* -----------------------------------------------------------------------------
   Loading Overlay
   ----------------------------------------------------------------------------- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    position: relative;
}

.loading-spinner::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

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

.loading-text {
    margin-top: var(--space-xl);
    color: var(--gray-600);
    font-size: 1rem;
    font-weight: 500;
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* -----------------------------------------------------------------------------
   Aspect Ratio Selector
   ----------------------------------------------------------------------------- */
.aspect-ratio-section {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-lg);
}

.aspect-ratio-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

@media (max-width: 768px) {
    .aspect-ratio-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

.aspect-ratio-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-fast);
}

.aspect-ratio-option:hover {
    border-color: var(--primary-light);
    background: var(--gray-50);
}

.aspect-ratio-option.selected {
    border-color: var(--primary);
    background: var(--primary-bg);
}

.aspect-ratio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.aspect-ratio-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    color: var(--gray-400);
}

.aspect-ratio-option.selected .aspect-ratio-preview {
    background: var(--primary);
    color: var(--white);
}

.aspect-ratio-preview svg {
    width: 100%;
    height: 100%;
}

/* 横長 16:9 */
.aspect-ratio-preview.aspect-landscape {
    width: 64px;
    height: 36px;
}

/* 広告用縦長 2:3 */
.aspect-ratio-preview.aspect-portrait {
    width: 40px;
    height: 60px;
}

/* 正方形 1:1 */
.aspect-ratio-preview.aspect-square {
    width: 48px;
    height: 48px;
}

/* 縦長 9:16 */
.aspect-ratio-preview.aspect-portrait-tall {
    width: 36px;
    height: 64px;
}

.aspect-ratio-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--gray-600);
    text-align: center;
}

.aspect-ratio-option.selected .aspect-ratio-label {
    color: var(--primary);
    font-weight: 600;
}

/* -----------------------------------------------------------------------------
   Pagination
   ----------------------------------------------------------------------------- */
.pagination {
    display: flex;
    justify-content: center;
}

.pagination-container {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
}

.pagination-btn:hover:not(.disabled) {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-btn.disabled {
    color: var(--gray-400);
    background: var(--gray-50);
    border-color: var(--gray-200);
    cursor: not-allowed;
}

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

.pagination-pages {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.pagination-page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-700);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: var(--transition-fast);
}

.pagination-page:hover:not(.active) {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-page.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    color: var(--gray-400);
    font-weight: 500;
}

/* -----------------------------------------------------------------------------
   Utilities
   ----------------------------------------------------------------------------- */
.d-flex {
    display: flex;
}

.align-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }

/* -----------------------------------------------------------------------------
   Responsive
   ----------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .main-content {
        margin-left: 0;
    }

    .page-content {
        padding: var(--space-md);
    }

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