/* ========================================
   Pin4Ash - CSS Styles
   ======================================== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-card: #16161f;

    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7a;

    --accent-primary: #e60023;
    --accent-primary-hover: #ad081b;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #e60023 0%, #8b5cf6 100%);

    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(22, 22, 31, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    --z-header: 100;
    --z-modal: 1000;
    --z-toast: 1500;
    --z-loading: 2000;

    --grid-gap: 16px;
    --column-width: 280px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50vh;
    background: radial-gradient(ellipse at top, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

.hidden {
    display: none !important;
}

/* ========================================
   Install Banner
   ======================================== */
.install-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-toast);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }

    to {
        transform: translateY(0);
    }
}

.install-content {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.install-content span {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.install-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ========================================
   Toast Notifications
   ======================================== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: auto;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-success {
    border-color: #22c55e;
}

.toast-error {
    border-color: var(--accent-primary);
}

/* ========================================
   Login Screen
   ======================================== */
.login-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 9999;
}

.login-card {
    width: 100%;
    max-width: 360px;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    margin: var(--spacing-md);
}

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

.login-logo-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    color: var(--accent-primary);
}

.login-logo-icon svg {
    width: 100%;
    height: 100%;
}

.login-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(230, 0, 35, 0.15);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.login-error {
    color: var(--accent-primary);
    font-size: var(--font-size-sm);
    text-align: center;
}

.login-btn {
    width: 100%;
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

/* ========================================
   App & Header
   ======================================== */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-sm) var(--spacing-md);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.logo:hover {
    background: var(--bg-tertiary);
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-primary);
}

.logo h1 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 600px) {
    .logo h1 {
        display: none;
    }
}

/* Search */
.search-form {
    display: flex;
    gap: var(--spacing-sm);
    flex: 1;
    max-width: 500px;
}

.search-input-wrapper {
    position: relative;
    flex: 1;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) calc(var(--spacing-md) * 2 + 18px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-normal);
    min-height: 42px;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(230, 0, 35, 0.15);
}

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

.clear-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--spacing-xs);
    color: var(--text-muted);
    border-radius: var(--radius-full);
}

.clear-btn:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-dropdown {
    position: relative;
}

.user-btn {
    width: 38px;
    height: 38px;
    padding: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.user-btn:hover {
    border-color: var(--accent-primary);
}

.user-avatar {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: white;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 50;
}

.dropdown-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.dropdown-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    text-align: left;
    font-size: var(--font-size-sm);
}

.dropdown-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    min-height: 42px;
    white-space: nowrap;
}

.btn-sm {
    min-height: 36px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

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

.btn-primary:hover {
    background: var(--accent-primary-hover);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.btn-text {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs);
}

.btn-text:hover {
    color: var(--accent-primary);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-icon-only {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.btn-icon-only:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-icon-only.btn-sm {
    width: 32px;
    height: 32px;
    font-size: var(--font-size-lg);
}

.saved-btn {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-sm);
}

.saved-btn:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.saved-count {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-primary);
    color: white;
    font-size: 10px;
    font-weight: 700;
    min-width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.search-btn {
    padding: var(--spacing-sm);
}

/* Main */
.main {
    flex: 1;
    padding: var(--spacing-md);
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

/* Welcome */
.welcome-state {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.welcome-content {
    max-width: 500px;
    width: 100%;
}

.welcome-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.welcome-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.suggestion-section,
.recommended-section,
.recent-section {
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.suggestion-section h3,
.recommended-section h3,
.recent-section h3 {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.chip {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chip:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.chip-recent {
    background: var(--bg-tertiary);
}

.chip-remove {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
    line-height: 1;
}

.chip-remove:hover {
    color: var(--accent-primary);
}

.chip-recommended {
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

.chip-recommended:hover {
    background: var(--accent-secondary);
    color: white;
    border-color: var(--accent-secondary);
}

/* Results */
.results-container {
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.results-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.back-btn {
    flex-shrink: 0;
}

.results-header h2 {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-muted);
}

.results-header h2 span {
    color: var(--text-primary);
    font-weight: 600;
}

.results-count {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* Grid */
.image-grid {
    display: columns;
    columns: var(--column-width);
    column-gap: var(--grid-gap);
}

.image-card {
    break-inside: avoid;
    margin-bottom: var(--grid-gap);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-card);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
}

.image-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.image-card img {
    width: 100%;
    height: auto;
    display: block;
}

.image-card.loading {
    background: var(--bg-secondary);
}

.image-card.loading::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.02), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

.card-save-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-normal);
    backdrop-filter: blur(4px);
}

.image-card:hover .card-save-btn {
    opacity: 1;
}

.card-save-btn:hover {
    background: var(--accent-primary);
    transform: scale(1.1);
}

.card-save-btn.saved {
    opacity: 1;
    color: var(--accent-primary);
    background: white;
}

/* Load More */
.load-more-container {
    display: flex;
    justify-content: center;
    padding: var(--spacing-xl) 0;
}

.loading-more {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.end-of-results {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Error */
.error-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
    text-align: center;
}

.error-content {
    max-width: 280px;
}

.error-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
    color: var(--accent-primary);
}

.error-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

/* Loading */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    backdrop-filter: blur(8px);
}

.loader {
    text-align: center;
}

.loader-ring {
    width: 40px;
    height: 40px;
    margin: 0 auto var(--spacing-md);
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    z-index: 1;
}

.modal-close:hover {
    background: var(--bg-tertiary);
}

.modal-content {
    max-width: 90vw;
    max-height: 60vh;
    overflow: hidden;
    border-radius: var(--radius-md);
}

.modal-content img {
    max-width: 100%;
    max-height: 60vh;
    object-fit: contain;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.modal-save.saved {
    background: white;
    color: var(--accent-primary);
}

/* Saved Panel */
.saved-panel {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: var(--z-modal);
    display: flex;
    justify-content: flex-end;
    backdrop-filter: blur(4px);
}

.saved-header {
    position: fixed;
    top: 0;
    right: 0;
    width: min(380px, 100vw);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    z-index: 1;
}

.saved-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.saved-grid {
    position: fixed;
    top: 60px;
    right: 0;
    bottom: 0;
    width: min(380px, 100vw);
    background: var(--bg-primary);
    overflow-y: auto;
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    align-content: start;
}

.saved-card {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
}

.saved-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.saved-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.6);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
    font-size: var(--font-size-lg);
    line-height: 1;
}

.saved-card:hover .saved-remove {
    opacity: 1;
}

.saved-remove:hover {
    background: var(--accent-primary);
}

.saved-empty {
    position: fixed;
    top: 60px;
    right: 0;
    bottom: 0;
    width: min(380px, 100vw);
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    text-align: center;
    padding: var(--spacing-xl);
}

.saved-empty p {
    font-weight: 500;
}

.saved-empty span {
    font-size: var(--font-size-sm);
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --grid-gap: 8px;
        --column-width: 160px;
    }

    .main {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --column-width: 140px;
    }
}

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Safe area for notched phones */
@supports (padding: max(0px)) {
    .header {
        padding-top: max(var(--spacing-sm), env(safe-area-inset-top));
    }

    .install-banner {
        padding-bottom: max(var(--spacing-md), env(safe-area-inset-bottom));
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}