/* ============================================
   Pinspire - Modern Pinterest Alternative
   Design System & Styles
   ============================================ */

/* CSS Variables - Noir Editorial Palette */
:root {
    /* Colors */
    --color-bg: #0F0F0F;
    --color-surface: #1A1A1A;
    --color-surface-elevated: #2A2A2A;
    --color-text-primary: #E8E4DF;
    --color-text-secondary: #A39E93;
    --color-text-muted: #6B6560;
    --color-accent: #C8B8A0;
    --color-accent-hover: #D4C4AC;
    --color-error: #E74C3C;
    --color-success: #27AE60;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', -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;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(200, 184, 160, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface-elevated);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(200, 184, 160, 0.1);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(15, 15, 15, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    gap: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.logo:hover {
    color: var(--color-accent);
    transform: scale(1.02);
}

.logo-icon {
    width: 32px;
    height: 32px;
    stroke: var(--color-accent);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-search {
    flex: 1;
    max-width: 600px;
    position: relative;
}

.nav-search input {
    width: 100%;
    padding: var(--space-sm) var(--space-md) var(--space-sm) 2.5rem;
    background: var(--color-surface);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: 0.95rem;
    transition: var(--transition-base);
}

.nav-search input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface-elevated);
    box-shadow: var(--shadow-glow);
}

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

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

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

.nav-btn {
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.nav-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-surface);
}

.nav-btn.active {
    color: var(--color-text-primary);
    background: var(--color-surface-elevated);
}

.create-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: var(--color-accent) !important;
    color: var(--color-bg) !important;
    font-weight: 600;
}

.create-btn:hover {
    background: var(--color-accent-hover) !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent), #8B7355);
    border: 2px solid transparent;
    color: var(--color-bg);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar:hover {
    border-color: var(--color-accent);
    transform: scale(1.05);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    min-width: 200px;
    background: var(--color-surface-elevated);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(200, 184, 160, 0.1);
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

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

.dropdown-divider {
    height: 1px;
    background: rgba(200, 184, 160, 0.1);
    margin: var(--space-sm) 0;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(80px + var(--space-3xl)) var(--space-xl) var(--space-3xl);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-words {
    height: 1.2em;
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.hero-word {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600;
    color: var(--color-accent);
    opacity: 0;
    transform: translateY(100%);
    transition: var(--transition-slow);
}

.hero-word.active {
    opacity: 1;
    transform: translateY(0);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.3s forwards;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.5s forwards;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(200, 184, 160, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

/* ============================================
   Buttons
   ============================================ */

.btn-primary {
    padding: var(--space-md) var(--space-xl);
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-bg);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: 2px solid var(--color-surface-elevated);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-surface-elevated);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-social:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-accent);
}

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

/* ============================================
   Main Content
   ============================================ */

.main-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--space-xl);
}

/* Category Pills */
.category-pills {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    overflow-x: auto;
    padding-bottom: var(--space-sm);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.category-pills::-webkit-scrollbar {
    display: none;
}

.pill {
    flex-shrink: 0;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-surface);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.pill:hover {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
}

.pill.active {
    background: var(--color-text-primary);
    color: var(--color-bg);
    border-color: var(--color-text-primary);
}

/* ============================================
   Masonry Grid
   ============================================ */

.masonry-grid {
    column-count: 2;
    column-gap: var(--space-lg);
}

@media (min-width: 640px) {
    .masonry-grid {
        column-count: 3;
    }
}

@media (min-width: 1024px) {
    .masonry-grid {
        column-count: 4;
    }
}

@media (min-width: 1400px) {
    .masonry-grid {
        column-count: 5;
    }
}

/* Pin Card */
.pin-card {
    break-inside: avoid;
    margin-bottom: var(--space-lg);
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.pin-card:nth-child(1) { animation-delay: 0.05s; }
.pin-card:nth-child(2) { animation-delay: 0.1s; }
.pin-card:nth-child(3) { animation-delay: 0.15s; }
.pin-card:nth-child(4) { animation-delay: 0.2s; }
.pin-card:nth-child(5) { animation-delay: 0.25s; }
.pin-card:nth-child(6) { animation-delay: 0.3s; }
.pin-card:nth-child(7) { animation-delay: 0.35s; }
.pin-card:nth-child(8) { animation-delay: 0.4s; }

.pin-card:hover {
    transform: translateY(-4px);
}

.pin-card:hover .pin-image {
    transform: scale(1.05);
}

.pin-card:hover .pin-overlay {
    opacity: 1;
}

.pin-image-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.pin-image {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.pin-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 0%, rgba(0,0,0,0.6) 100%);
    opacity: 0;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-md);
}

.pin-save-btn {
    align-self: flex-end;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-bg);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    transform: translateY(-10px);
    opacity: 0;
}

.pin-card:hover .pin-save-btn {
    transform: translateY(0);
    opacity: 1;
}

.pin-save-btn:hover {
    background: var(--color-accent-hover);
    transform: scale(1.05);
}

.pin-save-btn.saved {
    background: var(--color-success);
}

.pin-info {
    transform: translateY(10px);
    opacity: 0;
    transition: var(--transition-base) 0.1s;
}

.pin-card:hover .pin-info {
    transform: translateY(0);
    opacity: 1;
}

.pin-title {
    color: var(--color-text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.pin-author-avatar {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent), #8B7355);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-bg);
}

.pin-author-name {
    color: var(--color-text-secondary);
    font-size: 0.8rem;
}

/* ============================================
   Modal
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.95) translateY(20px);
    transition: var(--transition-slow);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(200, 184, 160, 0.1);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid rgba(200, 184, 160, 0.1);
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-body {
    padding: var(--space-xl);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid rgba(200, 184, 160, 0.1);
}

/* Upload Area */
.upload-area {
    position: relative;
    min-height: 200px;
    border: 2px dashed var(--color-surface-elevated);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    transition: var(--transition-fast);
    cursor: pointer;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--color-accent);
    background: rgba(200, 184, 160, 0.05);
}

.upload-placeholder {
    text-align: center;
    padding: var(--space-xl);
}

.upload-placeholder svg {
    width: 48px;
    height: 48px;
    stroke: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.upload-placeholder p {
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.upload-placeholder span {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.preview-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.preview-image.active {
    display: block;
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-surface-elevated);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23A39E93' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-right: 2.5rem;
}

/* Auth Modal Specific */
.auth-modal {
    max-width: 420px;
}

.auth-header {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl) var(--space-lg);
}

.auth-logo {
    width: 48px;
    height: 48px;
    stroke: var(--color-accent);
    margin-bottom: var(--space-md);
}

.auth-header h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: var(--space-xs);
}

.auth-header p {
    color: var(--color-text-secondary);
}

.auth-body {
    padding: 0 var(--space-xl) var(--space-2xl);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-surface-elevated);
}

.auth-toggle {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.auth-toggle a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-toggle a:hover {
    text-decoration: underline;
}

/* ============================================
   Toast Notification
   ============================================ */

.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    z-index: 3000;
    opacity: 0;
    transition: var(--transition-slow);
}

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

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(200, 184, 160, 0.2);
}

.toast-icon {
    width: 20px;
    height: 20px;
    stroke: var(--color-success);
}

.toast-message {
    color: var(--color-text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

/* ============================================
   Loading Spinner
   ============================================ */

.loading-spinner {
    display: flex;
    justify-content: center;
    padding: var(--space-2xl);
    opacity: 0;
    transition: var(--transition-base);
}

.loading-spinner.active {
    opacity: 1;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-surface-elevated);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .nav-container {
        padding: var(--space-md);
        gap: var(--space-sm);
    }
    
    .logo-text {
        display: none;
    }
    
    .nav-search {
        max-width: none;
    }
    
    .nav-btn:not(.create-btn) {
        display: none;
    }
    
    .hero {
        min-height: 60vh;
        padding-top: calc(70px + var(--space-2xl));
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .main-content {
        padding: var(--space-md);
    }
    
    .masonry-grid {
        column-gap: var(--space-md);
    }
    
    .pin-card {
        margin-bottom: var(--space-md);
    }
    
    .modal {
        max-height: 95vh;
        border-radius: var(--radius-lg);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--space-md);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}