/* ==================================================
   MAIN CSS — Design Tokens, Base Styles, Layout
   ================================================== */

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #22d3ee;
    --color-accent: #a855f7;
    --color-bg: #0a0a0f;
    --color-bg-2: #121218;
    --color-surface: #16161e;
    --color-surface-2: #1d1d28;
    --color-border: #262634;
    --color-text: #f3f4f8;
    --color-text-muted: #9ca3b8;
    --color-text-dim: #6b7288;
    --color-success: #34d399;
    --color-warning: #fbbf24;
    --color-error: #f87171;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    --font-size-5xl: 3.75rem;
    --font-size-6xl: 4.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 2.5rem;
    --space-8: 3rem;
    --space-9: 4rem;
    --space-10: 5rem;
    --space-11: 6rem;
    --space-12: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-pad: 1.5rem;
    --section-pad: 5rem;

    /* Radii */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.25rem;
    --radius-xl: 1.75rem;
    --radius-full: 9999px;

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
    --shadow-glow-primary: 0 0 40px rgba(99, 102, 241, 0.35);
    --shadow-glow-secondary: 0 0 40px rgba(34, 211, 238, 0.2);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index */
    --z-nav: 1000;
    --z-modal: 2000;
}

/* ================= RESET ================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 4.5rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 100% 0%, rgba(99, 102, 241, 0.08), transparent),
        radial-gradient(ellipse 60% 50% at 0% 50%, rgba(34, 211, 238, 0.05), transparent),
        radial-gradient(ellipse 50% 40% at 50% 100%, rgba(168, 85, 247, 0.06), transparent);
    pointer-events: none;
    z-index: 0;
}

main, .nav, .footer__content, .footer__bottom {
    position: relative;
    z-index: 1;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ================= TYPOGRAPHY ================= */
.eyebrow {
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary-light);
    margin-bottom: var(--space-4);
    user-select: none;
}

.section-title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--font-size-base);
    line-height: 1.65;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ================= LAYOUT ================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-9);
}

/* ================= HEADER / NAV ================= */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-base), background var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    border-bottom-color: var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--font-size-md);
    letter-spacing: -0.01em;
    transition: transform var(--transition-fast);
}

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

.logo-img {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    padding: var(--space-2) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-full);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.nav-link--external {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link--external svg {
    opacity: 0.7;
}

.nav-toggle {
    display: none;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-md);
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: calc(var(--z-nav) + 1);
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0.5rem;
    width: 1.5rem;
}

.nav-toggle {
    position: relative;
}

.hamburger::before { top: 1rem; }
.hamburger::after { bottom: 1rem; }

.nav-toggle.active .hamburger {
    background: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: translateY(5px) rotate(45deg);
    top: 1.25rem;
}

.nav-toggle.active .hamburger::after {
    transform: translateY(-5px) rotate(-45deg);
    bottom: 1.25rem;
}

/* ================= HERO ================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, transparent 0%, var(--color-bg) 100%);
    pointer-events: none;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
}

.hero__title--gradient {
    background: linear-gradient(100deg, var(--color-primary-light), var(--color-secondary) 55%, var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.hero__description {
    font-size: clamp(var(--font-size-md), 2vw, var(--font-size-lg));
    line-height: 1.6;
    color: var(--color-text-muted);
    max-width: 480px;
    margin-bottom: var(--space-7);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.hero__visual {
    position: relative;
    height: 420px;
    border-radius: var(--radius-xl);
    background: linear-gradient(145deg, var(--color-surface), var(--color-bg-2));
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.hero__visual-frame {
    position: absolute;
    inset: var(--space-6);
    border-radius: var(--radius-lg);
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.hero__visual-img {
    width: 72%;
    height: 72%;
    object-fit: contain;
    filter: drop-shadow(0 12px 40px rgba(99, 102, 241, 0.35));
    transition: transform var(--transition-slow);
}

.hero__visual:hover .hero__visual-img {
    transform: scale(1.05);
}

.hero__gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: float-orb 12s ease-in-out infinite;
}

.hero__gradient-orb--1 {
    width: 260px;
    height: 260px;
    background: rgba(99, 102, 241, 0.55);
    top: 10%;
    left: 15%;
}

.hero__gradient-orb--2 {
    width: 180px;
    height: 180px;
    background: rgba(34, 211, 238, 0.45);
    bottom: 15%;
    right: 10%;
    animation-delay: -4s;
}

.hero__gradient-orb--3 {
    width: 120px;
    height: 120px;
    background: rgba(168, 85, 247, 0.5);
    top: 55%;
    left: 55%;
    animation-delay: -8s;
}

@keyframes float-orb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -15px) scale(1.05); }
    66% { transform: translate(-15px, 12px) scale(0.97); }
}

/* ================= PRODUCTS ================= */
.products {
    padding: var(--section-pad) 0;
    background: var(--color-bg-2);
}

.products__grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-9);
}

/* ================= ABOUT ================= */
.about {
    padding: var(--section-pad) 0;
}

.about__content {
    max-width: 680px;
    margin: 0 auto;
    text-align: center;
}

.about__text p {
    font-size: var(--font-size-md);
    line-height: 1.7;
    color: var(--color-text-muted);
    margin-bottom: var(--space-5);
}

.about__link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-5);
    font-weight: 600;
    font-size: var(--font-size-md);
    color: var(--color-primary-light);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.about__link:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow-primary);
    transform: translateY(-2px);
}

/* ================= CONTACT ================= */
.contact {
    padding: var(--section-pad) 0;
    background: var(--color-bg-2);
}

.contact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    max-width: 1000px;
    margin: 0 auto;
}

/* ================= FOOTER ================= */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-9);
}

.footer__content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-6);
    padding-bottom: var(--space-8);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.footer__logo-img {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-md);
    object-fit: contain;
}

.footer__logo-text {
    font-weight: 700;
    font-size: var(--font-size-md);
}

.footer__tagline {
    color: var(--color-text-dim);
    font-size: var(--font-size-sm);
}

.footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-5);
}

.footer__links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer__links a:hover {
    color: var(--color-primary-light);
}

.footer__bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-6) 0;
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-dim);
}

/* ================= SCROLLBAR ================= */
::-webkit-scrollbar {
    width: 10px;
}

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

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

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

/* ================= SELECTION ================= */
::selection {
    background: rgba(99, 102, 241, 0.4);
    color: var(--color-text);
}