/* Slide Prompt Ideas - Apple-Inspired Design */

:root {
    /* Apple-inspired color palette */
    --apple-blue: #0071e3;
    --apple-blue-hover: #0077ed;
    --apple-gray-900: #1d1d1f;
    --apple-gray-700: #424245;
    --apple-gray-500: #6e6e73;
    --apple-gray-300: #86868b;
    --apple-gray-100: #f5f5f7;
    --apple-white: #ffffff;
    
    /* Semantic colors */
    --bg-primary: var(--apple-white);
    --bg-secondary: var(--apple-gray-100);
    --text-primary: var(--apple-gray-900);
    --text-secondary: var(--apple-gray-500);
    --text-tertiary: var(--apple-gray-300);
    --accent: var(--apple-blue);
    --accent-hover: var(--apple-blue-hover);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, monospace;
    
    /* Borders and Shadows */
    --border-light: rgba(0, 0, 0, 0.04);
    --border-medium: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.08), 0 8px 16px rgba(0, 0, 0, 0.04);
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.47059;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
}

/* ==================== Header ==================== */

.header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    padding-top: var(--space-xl);
}

.title {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.1;
}

.subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

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

.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-3xl);
    padding: var(--space-xs);
}

.category-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    border-radius: 980px;
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 400;
    transition: var(--transition-fast);
    cursor: pointer;
}

.category-pill:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.category-pill.active {
    background: var(--text-primary);
    color: var(--apple-white);
}

.category-pill.active:hover {
    background: var(--apple-gray-700);
}

.category-icon {
    font-size: 1rem;
    line-height: 1;
}

.category-name {
    line-height: 1;
}

/* ==================== Categories Grid (Home View) ==================== */

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.category-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    min-height: 220px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.02) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition-base);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.card-icon {
    font-size: 2.25rem;
    margin-bottom: var(--space-lg);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.category-card:hover .card-icon {
    transform: scale(1.05);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(0, 113, 227, 0.08) 100%);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    flex-grow: 1;
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

.card-count {
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 500;
}

/* ==================== Prompts Section ==================== */

.prompts-section {
    margin-bottom: var(--space-3xl);
}

.section-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border-medium);
}

.section-icon {
    font-size: 2rem;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.section-info {
    padding-top: var(--space-xs);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-description {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.5;
}

/* ==================== Prompts Grid ==================== */

.prompts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.prompt-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    transition: var(--transition-base);
}

.prompt-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-lg);
}

.prompt-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
    line-height: 1.35;
}

.prompt-text {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: var(--space-lg);
}

/* ==================== Copy Button ==================== */

.copy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--accent);
    border: none;
    border-radius: 980px;
    color: var(--apple-white);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    align-self: flex-start;
}

.copy-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

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

.copy-btn.copied {
    background: #34c759;
}

.copy-icon {
    font-size: 0.875rem;
    font-style: normal;
    line-height: 1;
}

.copy-text {
    line-height: 1;
}

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

.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(calc(100% + var(--space-xl)));
    background: var(--text-primary);
    color: var(--apple-white);
    padding: var(--space-md) var(--space-xl);
    border-radius: 980px;
    font-size: 0.9375rem;
    font-weight: 500;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    transition: var(--transition-base);
    z-index: 1000;
}

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

/* ==================== Footer ==================== */

.footer {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

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

@media (max-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .header {
        margin-bottom: var(--space-2xl);
        padding-top: var(--space-lg);
    }
    
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.0625rem;
    }
    
    .category-nav {
        gap: var(--space-xs);
        margin-bottom: var(--space-2xl);
    }
    
    .category-pill {
        padding: var(--space-sm) var(--space-sm);
        font-size: 0.875rem;
    }
    
    .category-name {
        display: none;
    }
    
    .category-pill.active .category-name,
    .category-pill:first-child .category-name {
        display: inline;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .category-card {
        min-height: auto;
        padding: var(--space-lg);
    }
    
    .prompts-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .prompt-card {
        padding: var(--space-lg);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .section-icon {
        width: 52px;
        height: 52px;
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .copy-btn {
        width: 100%;
        justify-content: center;
        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;
    }
}

/* ==================== Focus States ==================== */

.category-pill:focus-visible,
.category-card:focus-visible,
.copy-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ==================== Selection ==================== */

::selection {
    background: rgba(0, 113, 227, 0.2);
}