/* ==========================================
   Code Snippet Manager - Main Stylesheet
   Dark Mode Design with Glassmorphism
   ========================================== */

/* ==========================================
   CSS Variables
   ========================================== */
:root {
    /* Colors */
    --color-primary: #00d4ff;
    --color-primary-dark: #00a8cc;
    --color-secondary: #9d4edd;
    --color-accent: #ff006e;
    
    --color-bg-main: #0a0a0f;
    --color-bg-secondary: #121218;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: rgba(26, 26, 36, 0.6);
    --color-bg-modal: rgba(18, 18, 24, 0.95);
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-text-muted: #606070;
    
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-hover: rgba(255, 255, 255, 0.2);
    
    --color-success: #00f5a0;
    --color-error: #ff4757;
    --color-warning: #ffa502;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #9d4edd 100%);
    --gradient-secondary: linear-gradient(135deg, #ff006e 0%, #ffa502 100%);
    --gradient-dark: linear-gradient(180deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.8) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Fonts */
    --font-primary: 'Cairo', sans-serif;
    --font-code: 'Fira Code', monospace;
}

/* ==========================================
   Reset & Base Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background: var(--color-bg-main);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    
    /* Animated gradient background */
    background: linear-gradient(135deg, #0a0a0f 0%, #1a0a2e 50%, #0a0a0f 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 4px;
}

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

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

code, pre {
    font-family: var(--font-code);
}

/* ==========================================
   Container
   ========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   Header
   ========================================== */
.header {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

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

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

.logo h1 {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Search Container */
.search-container {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-icon {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) 3rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.search-count {
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card);
}

.btn-text {
    background: transparent;
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
}

.btn-text:hover {
    background: rgba(0, 212, 255, 0.1);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-icon-danger:hover {
    background: rgba(255, 71, 87, 0.1);
    border-color: var(--color-error);
    color: var(--color-error);
}

.btn-close {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

/* ==========================================
   Main Content
   ========================================== */
.main {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

/* ==========================================
   Tags Section
   ========================================== */
.tags-section {
    margin-bottom: var(--spacing-xl);
}

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

.tags-header h2 {
    color: var(--color-text-primary);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tags-empty {
    color: var(--color-text-muted);
    font-style: italic;
}

.tag-filter {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tag-filter:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.tag-filter.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.tag-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tag-filter.active .tag-count {
    background: rgba(255, 255, 255, 0.3);
}

/* ==========================================
   Snippets Section
   ========================================== */
.snippets-section {
    margin-bottom: var(--spacing-xl);
}

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

.snippets-count {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.snippets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

/* ==========================================
   Snippet Card
   ========================================== */
.snippet-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.snippet-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 212, 255, 0.2);
}

.snippet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.snippet-language {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.snippet-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.snippet-title {
    font-size: 1.125rem;
    color: var(--color-text-primary);
    margin: var(--spacing-xs) 0;
}

.snippet-description {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.snippet-code-wrapper {
    position: relative;
    margin: var(--spacing-sm) 0;
}

.snippet-code-wrapper pre {
    background: var(--color-bg-main);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    max-height: 200px;
    font-size: 0.875rem;
    line-height: 1.6;
}

.snippet-code-wrapper code {
    color: var(--color-text-primary);
}

.btn-copy {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-bg-tertiary);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0;
}

.snippet-card:hover .btn-copy {
    opacity: 1;
}

.btn-copy:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: scale(1.05);
}

.snippet-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.snippet-tags .tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(157, 78, 221, 0.2);
    border: 1px solid rgba(157, 78, 221, 0.3);
    border-radius: var(--radius-sm);
    color: var(--color-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.snippet-tags .tag:hover {
    background: var(--color-secondary);
    color: white;
    transform: scale(1.05);
}

.snippet-footer {
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.snippet-time {
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

/* ==========================================
   Empty State
   ========================================== */
.empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    gap: var(--spacing-md);
}

.empty-state svg {
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--color-text-primary);
}

.empty-state p {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* ==========================================
   Modal
   ========================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--color-bg-modal);
    backdrop-filter: blur(40px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Form
   ========================================== */
.snippet-form {
    padding: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 0.875rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-textarea {
    font-family: var(--font-code);
    resize: vertical;
    min-height: 150px;
    line-height: 1.6;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* ==========================================
   Toast Notification
   ========================================== */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(200%);
    z-index: 2000;
    background: var(--color-bg-modal);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
    min-width: 300px;
}

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

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

.toast-icon {
    flex-shrink: 0;
    stroke: var(--color-success);
}

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

.toast-error .toast-icon {
    stroke: var(--color-error);
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .snippets-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        max-width: 100%;
        max-height: 100vh;
        border-radius: 0;
    }
    
    .form-actions {
        flex-direction: column-reverse;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .tags-container {
        gap: var(--spacing-xs);
    }
    
    .snippet-card {
        padding: var(--spacing-sm);
    }
}