/* =============================================================
   LANDING PAGE — Stylesheet
   =============================================================
   Desain modern dengan tema Dark Blue, Purple, Cyan.
   Glassmorphism, hover animations, smooth transitions.
   Responsive: Desktop, Tablet, Mobile.
   ============================================================= */

/* ─────────────────────────────────────────────
   1. GOOGLE FONTS
   ───────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ─────────────────────────────────────────────
   2. CSS VARIABLES / DESIGN TOKENS
   ───────────────────────────────────────────── */
:root {
    /* Background */
    --lp-bg-primary: #0f172a;
    --lp-bg-secondary: #0a0e1a;

    /* Card */
    --lp-card-bg: rgba(15, 23, 42, 0.6);
    --lp-card-border: rgba(255, 255, 255, 0.08);
    --lp-card-hover-border: rgba(14, 165, 233, 0.3);

    /* Accent */
    --lp-cyan: #06b6d4;
    --lp-purple: #8b5cf6;
    --lp-blue: #0ea5e9;
    --lp-indigo: #6366f1;
    --lp-pink: #ec4899;

    /* Text */
    --lp-text-primary: #f8fafc;
    --lp-text-secondary: #cbd5e1;
    --lp-text-muted: #94a3b8;

    /* Typography */
    --lp-font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --lp-font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --lp-section-padding: 5rem 2rem;

    /* Transitions */
    --lp-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

    /* Borders */
    --lp-radius-sm: 8px;
    --lp-radius-md: 12px;
    --lp-radius-lg: 16px;
    --lp-radius-xl: 20px;
}

/* ─────────────────────────────────────────────
   3. BASE RESET
   ───────────────────────────────────────────── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--lp-font-sans);
    background-color: var(--lp-bg-primary);
    color: var(--lp-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ─────────────────────────────────────────────
   4. BACKGROUND ANIMATED ELEMENTS
   ───────────────────────────────────────────── */
.lp-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.lp-bg__blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: blobFloat 20s ease-in-out infinite;
}

.lp-bg__blob--1 {
    width: 600px;
    height: 600px;
    background: var(--lp-purple);
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.lp-bg__blob--2 {
    width: 500px;
    height: 500px;
    background: var(--lp-cyan);
    bottom: -10%;
    left: -10%;
    animation-delay: -7s;
}

.lp-bg__blob--3 {
    width: 400px;
    height: 400px;
    background: var(--lp-blue);
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: -14s;
}

/* Grid pattern overlay */
.lp-bg__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(40px, 30px) scale(1.02); }
}

/* ─────────────────────────────────────────────
   5. MAIN CONTAINER
   ───────────────────────────────────────────── */
.lp-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ─────────────────────────────────────────────
   6. HERO SECTION
   ───────────────────────────────────────────── */
.lp-hero {
    min-height: calc(100vh - 64px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 1rem 2rem;
}

/* Badge */
.lp-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--lp-cyan);
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

.lp-hero__badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--lp-cyan);
    animation: pulse 2s ease-in-out infinite;
}

/* Title */
.lp-hero__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.lp-hero__title-gradient {
    background: linear-gradient(135deg, var(--lp-cyan) 0%, var(--lp-purple) 50%, var(--lp-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Subtitle */
.lp-hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-weight: 400;
    color: var(--lp-text-secondary);
    max-width: 640px;
    margin: 0 auto 1.5rem;
    line-height: 1.6;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

/* Description */
.lp-hero__description {
    font-size: 0.95rem;
    color: var(--lp-text-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* Specs Badges */
.lp-hero__specs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.lp-hero__spec {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--lp-text-secondary);
}

/* Scroll indicator */
.lp-hero__scroll {
    margin-top: auto;
    padding-top: 2rem;
    animation: fadeInUp 0.6s ease-out 0.5s both;
}

.lp-hero__scroll-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--lp-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.lp-hero__scroll-arrow {
    font-size: 1.2rem;
    animation: bounceDown 2s ease-in-out infinite;
}

/* ─────────────────────────────────────────────
   7. MODULES SECTION
   ───────────────────────────────────────────── */
.lp-modules {
    padding: var(--lp-section-padding);
}

.lp-modules__header {
    text-align: center;
    margin-bottom: 3rem;
}

.lp-modules__label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--lp-cyan);
    margin-bottom: 0.75rem;
}

.lp-modules__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.lp-modules__subtitle {
    font-size: 0.95rem;
    color: var(--lp-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ─────────────────────────────────────────────
   8. CARD GRID
   ───────────────────────────────────────────── */
.lp-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

/* ─────────────────────────────────────────────
   9. MODULE CARD
   ───────────────────────────────────────────── */
.lp-card {
    position: relative;
    background: var(--lp-card-bg);
    border: 1px solid var(--lp-card-border);
    border-radius: var(--lp-radius-xl);
    padding: 2rem 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: all var(--lp-transition);
    overflow: hidden;
    cursor: default;
}

/* Gradient border glow on hover */
.lp-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--lp-radius-xl);
    padding: 1px;
    background: linear-gradient(135deg, transparent, transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background var(--lp-transition);
    pointer-events: none;
}

.lp-card:hover {
    transform: translateY(-6px);
    border-color: var(--lp-card-hover-border);
    box-shadow:
        0 20px 60px -15px rgba(0, 0, 0, 0.5),
        0 0 40px -10px var(--card-glow-color, rgba(0, 240, 255, 0.1));
}

.lp-card:hover::before {
    background: linear-gradient(135deg, var(--card-accent, var(--lp-cyan)), transparent 60%);
}

/* Card accent colors per modul */
.lp-card--des { --card-accent: #06b6d4; --card-glow-color: rgba(6, 182, 212, 0.15); --card-accent-rgb: 6, 182, 212; }
.lp-card--sdes { --card-accent: #8b5cf6; --card-glow-color: rgba(139, 92, 246, 0.15); --card-accent-rgb: 139, 92, 246; }
.lp-card--aes { --card-accent: #0ea5e9; --card-glow-color: rgba(14, 165, 233, 0.15); --card-accent-rgb: 14, 165, 233; }
.lp-card--saes { --card-accent: #ec4899; --card-glow-color: rgba(236, 72, 153, 0.15); --card-accent-rgb: 236, 72, 153; }

/* Card Icon */
.lp-card__icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--lp-radius-md);
    font-size: 1.6rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all var(--lp-transition);
}

.lp-card:hover .lp-card__icon {
    background: rgba(var(--card-accent-rgb, 0, 240, 255), 0.1);
    border-color: var(--card-accent, var(--lp-cyan));
    box-shadow: 0 0 20px rgba(var(--card-accent-rgb, 0, 240, 255), 0.15);
}

/* Card type badge */
.lp-card__type {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--card-accent, var(--lp-cyan));
    opacity: 0.8;
}

/* Card Title */
.lp-card__title {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Card Description */
.lp-card__desc {
    font-size: 0.88rem;
    color: var(--lp-text-secondary);
    line-height: 1.65;
    flex-grow: 1;
}

/* Card Specs (key size, rounds, etc.) */
.lp-card__specs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.lp-card__spec-tag {
    font-size: 0.7rem;
    font-family: var(--lp-font-mono);
    padding: 0.2rem 0.55rem;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 4px;
    color: var(--lp-text-muted);
}

/* Card Button */
.lp-card__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.7rem 1.25rem;
    background: linear-gradient(135deg, var(--card-accent, var(--lp-cyan)), rgba(var(--card-accent-rgb, 0, 240, 255), 0.7));
    color: #0a0e1a;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--lp-font-sans);
    border: none;
    border-radius: var(--lp-radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--lp-transition);
    margin-top: 0.5rem;
}

.lp-card__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(var(--card-accent-rgb, 0, 240, 255), 0.25);
    filter: brightness(1.1);
}

.lp-card__btn-arrow {
    transition: transform var(--lp-transition);
}

.lp-card__btn:hover .lp-card__btn-arrow {
    transform: translateX(3px);
}

/* ─────────────────────────────────────────────
   10. INFO SECTION
   ───────────────────────────────────────────── */
.lp-info {
    padding: 3rem 2rem 5rem;
}

.lp-info__card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--lp-card-bg);
    border: 1px solid var(--lp-card-border);
    border-radius: var(--lp-radius-xl);
    padding: 2.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-align: center;
}

.lp-info__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.lp-info__text {
    font-size: 0.9rem;
    color: var(--lp-text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* ─────────────────────────────────────────────
   11. ANIMATIONS
   ───────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Scroll reveal — cards */
.lp-card {
    opacity: 0;
    transform: translateY(30px);
}

.lp-card.is-visible {
    animation: fadeInUp 0.5s ease-out forwards;
}

.lp-card:nth-child(1).is-visible { animation-delay: 0s; }
.lp-card:nth-child(2).is-visible { animation-delay: 0.1s; }
.lp-card:nth-child(3).is-visible { animation-delay: 0.2s; }
.lp-card:nth-child(4).is-visible { animation-delay: 0.3s; }

/* ─────────────────────────────────────────────
   12. RESPONSIVE — TABLET
   ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .lp-hero {
        min-height: auto;
        padding: 3rem 1rem 2rem;
    }

    .lp-modules {
        padding: 3rem 1rem;
    }

    .lp-cards {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 1.25rem;
    }

    .lp-card {
        padding: 1.75rem 1.5rem;
    }

    .lp-hero__specs {
        gap: 0.5rem;
    }

    .lp-info__card {
        padding: 2rem 1.5rem;
    }
}

/* ─────────────────────────────────────────────
   13. RESPONSIVE — MOBILE
   ───────────────────────────────────────────── */
@media (max-width: 480px) {
    .lp-hero {
        padding: 2rem 0.75rem 1.5rem;
    }

    .lp-hero__badge {
        font-size: 0.72rem;
        padding: 0.35rem 0.85rem;
    }

    .lp-modules {
        padding: 2rem 0.75rem;
    }

    .lp-cards {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .lp-card {
        padding: 1.5rem 1.25rem;
    }

    .lp-card__title {
        font-size: 1.15rem;
    }

    .lp-hero__spec {
        font-size: 0.7rem;
        padding: 0.3rem 0.7rem;
    }

    .lp-info {
        padding: 2rem 0.75rem 3rem;
    }

    .lp-info__card {
        padding: 1.75rem 1.25rem;
    }
}