/* ==========================================================================
   Horizon Logic - Futuristic Landing Page
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-bg: #030712;
    --color-bg-elevated: #0a0f1a;
    --color-bg-card: rgba(15, 23, 42, 0.6);

    --color-primary: #6366f1;
    --color-primary-glow: rgba(99, 102, 241, 0.5);
    --color-accent: #22d3ee;
    --color-accent-glow: rgba(34, 211, 238, 0.5);

    --color-text: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;

    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-glow: rgba(99, 102, 241, 0.3);

    /* Tool Card Colors */
    --color-indigo: #6366f1;
    --color-teal: #14b8a6;
    --color-dark: #22c55e;
    --color-coral: #f43f5e;

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

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

/* --------------------------------------------------------------------------
   Animated Background
   -------------------------------------------------------------------------- */
.bg-animation {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
}

.bg-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent);
}

.bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, black, transparent);
}

.bg-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.bg-glow--1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.bg-glow--2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    top: 50%;
    right: -100px;
    animation-delay: -7s;
}

.bg-glow--3 {
    width: 500px;
    height: 500px;
    background: #8b5cf6;
    bottom: -200px;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* --------------------------------------------------------------------------
   Container
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--spacing-lg) 0;
    background: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
}

.nav__logo-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { text-shadow: 0 0 20px var(--color-primary-glow); }
    50% { text-shadow: 0 0 40px var(--color-primary-glow), 0 0 60px var(--color-primary-glow); }
}

.nav__logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav__logo-accent {
    color: var(--color-accent);
}

.nav__links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav__link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transition: width var(--transition-normal);
}

.nav__link:hover {
    color: var(--color-text);
}

.nav__link:hover::after {
    width: 100%;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-4xl) 0;
    padding-top: calc(var(--spacing-4xl) + 80px);
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero__title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.hero__title-gradient {
    display: block;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.7;
}

.hero__cta {
    display: flex;
    justify-content: center;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 0 30px var(--color-primary-glow), 0 10px 40px rgba(0, 0, 0, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px var(--color-primary-glow), 0 15px 50px rgba(0, 0, 0, 0.4);
}

.btn--primary svg {
    transition: transform var(--transition-fast);
}

.btn--primary:hover svg {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Section Styles
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* --------------------------------------------------------------------------
   Tools Section
   -------------------------------------------------------------------------- */
.tools {
    padding: var(--spacing-4xl) 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.tool-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--card-color);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.tool-card:hover {
    transform: translateY(-8px);
    border-color: var(--card-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 60px var(--card-glow);
}

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

.tool-card--indigo {
    --card-color: var(--color-indigo);
    --card-glow: rgba(99, 102, 241, 0.2);
}

.tool-card--teal {
    --card-color: var(--color-teal);
    --card-glow: rgba(20, 184, 166, 0.2);
}

.tool-card--dark {
    --card-color: var(--color-dark);
    --card-glow: rgba(34, 197, 94, 0.2);
}

.tool-card--coral {
    --card-color: var(--color-coral);
    --card-glow: rgba(244, 63, 94, 0.2);
}

.tool-card--amber {
    --card-color: #f59e0b;
    --card-glow: rgba(245, 158, 11, 0.2);
}

.tool-card--purple {
    --card-color: #8b5cf6;
    --card-glow: rgba(139, 92, 246, 0.2);
}

.tool-card--blue {
    --card-color: #3b82f6;
    --card-glow: rgba(59, 130, 246, 0.2);
}

.tool-card--cyan {
    --card-color: #06b6d4;
    --card-glow: rgba(6, 182, 212, 0.2);
}

.tool-card--pink {
    --card-color: #ec4899;
    --card-glow: rgba(236, 72, 153, 0.2);
}

.tool-card--emerald {
    --card-color: #10b981;
    --card-glow: rgba(16, 185, 129, 0.2);
}

.tool-card--slate {
    --card-color: #64748b;
    --card-glow: rgba(100, 116, 139, 0.2);
}

.tool-card--red {
    --card-color: #ef4444;
    --card-glow: rgba(239, 68, 68, 0.2);
}

.tool-card--lime {
    --card-color: #84cc16;
    --card-glow: rgba(132, 204, 22, 0.2);
}

.tool-card--orange {
    --card-color: #f97316;
    --card-glow: rgba(249, 115, 22, 0.2);
}

.tool-card--sky {
    --card-color: #0ea5e9;
    --card-glow: rgba(14, 165, 233, 0.2);
}

.tool-card--yellow {
    --card-color: #eab308;
    --card-glow: rgba(234, 179, 8, 0.2);
}

.tool-card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--card-color);
    transition: all var(--transition-normal);
}

.tool-card:hover .tool-card__icon {
    background: var(--card-color);
    color: white;
    box-shadow: 0 0 30px var(--card-glow);
}

.tool-card__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

.tool-card__tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

.tool-card__arrow {
    position: absolute;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    color: var(--color-text-muted);
    transition: all var(--transition-normal);
}

.tool-card:hover .tool-card__arrow {
    color: var(--card-color);
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    padding: var(--spacing-4xl) 0;
}

.about .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about__content {
    max-width: 500px;
}

.about__text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.about__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.about__list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
}

.about__list li svg {
    flex-shrink: 0;
    color: var(--color-accent);
    margin-top: 2px;
}

.about__list li strong {
    color: var(--color-text);
}

.about__visual {
    display: flex;
    justify-content: center;
}

.about__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    backdrop-filter: blur(10px);
    display: grid;
    gap: var(--spacing-xl);
}

.about__stat {
    text-align: center;
}

.about__stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.about__stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

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

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

.footer__tagline {
    color: var(--color-text-secondary);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

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

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .nav__links {
        display: none;
    }

    .about .container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .about__visual {
        order: -1;
    }

    .about__card {
        grid-template-columns: repeat(3, 1fr);
    }

    .about__stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .about__card {
        grid-template-columns: 1fr;
    }
}

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

    html {
        scroll-behavior: auto;
    }
}

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

/* --------------------------------------------------------------------------
   Footer Links
   -------------------------------------------------------------------------- */
.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer__links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-text-secondary);
}