/* ==========================================================================
   STARTER SAAS - CLEAN MINIMAL DESIGN SYSTEM
   Identity: Clean, accessible, modern minimalism
   Colors: Neutral grays with violet accent
   ========================================================================== */

/* ==========================================================================
   CSS CUSTOM PROPERTIES
   ========================================================================== */

:root {
    /* Primary - Violet accent (distinct from teal/indigo/purple variants) */
    --color-primary-50: #f5f3ff;
    --color-primary-100: #ede9fe;
    --color-primary-200: #ddd6fe;
    --color-primary-300: #c4b5fd;
    --color-primary-400: #a78bfa;
    --color-primary-500: #8b5cf6;
    --color-primary-600: #7c3aed;
    --color-primary-700: #6d28d9;
    --color-primary-800: #5b21b6;
    --color-primary-900: #4c1d95;

    /* Neutral - Warm gray tones */
    --color-neutral-50: #fafaf9;
    --color-neutral-100: #f5f5f4;
    --color-neutral-200: #e7e5e4;
    --color-neutral-300: #d6d3d1;
    --color-neutral-400: #a8a29e;
    --color-neutral-500: #78716c;
    --color-neutral-600: #57534e;
    --color-neutral-700: #44403c;
    --color-neutral-800: #292524;
    --color-neutral-900: #1c1917;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Light Mode */
    --color-background: #ffffff;
    --color-surface: #fafaf9;
    --color-text-primary: #1c1917;
    --color-text-secondary: #57534e;
    --color-text-tertiary: #a8a29e;
    --color-border: #e7e5e4;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Typography Scale */
    --text-hero: clamp(2.5rem, 6vw, 4.5rem);
    --text-display: clamp(2rem, 4vw, 3rem);
    --text-h1: clamp(1.75rem, 3vw, 2.25rem);
    --text-h2: clamp(1.5rem, 2.5vw, 1.875rem);
    --text-h3: clamp(1.125rem, 2vw, 1.25rem);
    --text-body: 1rem;
    --text-small: 0.875rem;
    --text-xs: 0.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Glow */
    --glow-primary: 0 0 40px rgba(139, 92, 246, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms cubic-bezier(0.16, 1, 0.3, 1);
    --transition-reveal: 800ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode */
.dark {
    --color-background: #0a0a0a;
    --color-surface: #171717;
    --color-text-primary: #fafaf9;
    --color-text-secondary: #d6d3d1;
    --color-text-tertiary: #78716c;
    --color-border: #292524;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

/* ==========================================================================
   BASE STYLES
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-body);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ==========================================================================
   UNIQUE: SUBTLE DOT GRID BACKGROUND
   ========================================================================== */

.bg-dot-grid {
    background-image: radial-gradient(circle, var(--color-neutral-200) 1px, transparent 1px);
    background-size: 24px 24px;
}

.dark .bg-dot-grid {
    background-image: radial-gradient(circle, var(--color-neutral-800) 1px, transparent 1px);
}

/* Subtle gradient overlay */
.bg-gradient-subtle {
    background: linear-gradient(
        180deg,
        var(--color-background) 0%,
        var(--color-surface) 50%,
        var(--color-background) 100%
    );
}

/* ==========================================================================
   TEXT GRADIENTS
   ========================================================================== */

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */

.reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 0;
}

.reveal {
    transform: translateY(30px);
    transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    transform: translateX(-30px);
    transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    transform: translateX(30px);
    transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    transform: scale(0.95);
    transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }

/* ==========================================================================
   HOVER EFFECTS
   ========================================================================== */

.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: var(--glow-primary);
}

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.02);
}

/* ==========================================================================
   CONTINUOUS ANIMATIONS
   ========================================================================== */

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}

@keyframes pulse-soft {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.animate-pulse-soft {
    animation: pulse-soft 2s ease-in-out infinite;
}

/* ==========================================================================
   COMPONENT STYLES
   ========================================================================== */

/* Feature Cards */
.feature-card {
    padding: var(--space-8);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-primary-200);
    box-shadow: var(--shadow-lg);
}

.dark .feature-card:hover {
    border-color: var(--color-primary-800);
}

/* Icon Box */
.icon-box {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-50);
    border-radius: var(--radius-lg);
    color: var(--color-primary-600);
    transition: all var(--transition-base);
}

.dark .icon-box {
    background: var(--color-primary-900);
    color: var(--color-primary-400);
}

.feature-card:hover .icon-box {
    background: var(--color-primary-500);
    color: white;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: var(--text-small);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--color-neutral-900);
    color: white;
}

.dark .btn-primary {
    background: white;
    color: var(--color-neutral-900);
}

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

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

.btn-secondary:hover {
    border-color: var(--color-neutral-400);
    background: var(--color-surface);
}

/* Pricing Cards */
.pricing-card {
    padding: var(--space-8);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
}

.pricing-card.featured {
    border-color: var(--color-primary-500);
    box-shadow: var(--glow-primary);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Testimonial Cards */
.testimonial-card {
    padding: var(--space-8);
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.badge-live::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse-soft 2s infinite;
}

/* Integration Logo Cards */
.integration-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.integration-card:hover {
    border-color: var(--color-primary-200);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */

.nav-link {
    font-size: var(--text-small);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1140px;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.section-padding {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
}

@media (max-width: 768px) {
    .section-padding {
        padding-top: var(--space-16);
        padding-bottom: var(--space-16);
    }
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* ==========================================================================
   SELECTION & SCROLLBAR
   ========================================================================== */

::selection {
    background-color: var(--color-primary-200);
    color: var(--color-primary-900);
}

.dark ::selection {
    background-color: var(--color-primary-800);
    color: var(--color-primary-100);
}

::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-neutral-300);
    border-radius: var(--radius-full);
}

.dark ::-webkit-scrollbar-thumb {
    background: var(--color-neutral-700);
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

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

    .reveal, .reveal-left, .reveal-right, .reveal-scale {
        opacity: 1;
        transform: none;
    }
}

/* ==========================================================================
   PERFORMANCE
   ========================================================================== */

section {
    content-visibility: auto;
    contain-intrinsic-size: 0 500px;
}

.animate-float {
    transform: translateZ(0);
    will-change: transform;
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
    nav, footer, .no-print {
        display: none;
    }

    body {
        background: white;
        color: black;
    }
}