/* =====================================================================
   Landing page styles - hero, sections, planet path, final CTA
   ===================================================================== */

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-h) + var(--sp-12)) var(--sp-4) var(--sp-16);
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.7;
}

.hero-grid {
    position: relative;
    z-index: 2;
    max-width: var(--container-max);
    width: 100%;
    margin-inline: auto;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--sp-16);
    align-items: center;
}

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-sam { order: -1; }
}

.hero-text { opacity: 0; transform: translateY(20px); }
.hero-badge { margin-bottom: var(--sp-4); }

.hero-title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    line-height: 1;
    margin-bottom: var(--sp-5);
    font-weight: var(--fw-black);
}
.hero-line {
    display: block;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--c-text-2);
    margin-bottom: var(--sp-8);
    max-width: 560px;
}
@media (max-width: 900px) { .hero-subtitle { margin-inline: auto; } }

.hero-cta {
    display: flex;
    gap: var(--sp-4);
    margin-bottom: var(--sp-12);
    flex-wrap: wrap;
}
@media (max-width: 900px) { .hero-cta { justify-content: center; } }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: var(--sp-8);
    justify-content: start;
}
@media (max-width: 900px) {
    .hero-stats { justify-content: center; }
}
@media (max-width: 560px) {
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: var(--sp-4); width: 100%; }
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.stat-num {
    font-family: var(--font-num);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: var(--fw-black);
    line-height: 1;
    background: var(--grad-warm);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline;
}
.stat-suffix {
    font-family: var(--font-num);
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    color: var(--c-neon-gold);
    font-weight: var(--fw-black);
}
.stat-label {
    font-size: var(--fs-xs);
    color: var(--c-text-3);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ---------- Sam floating ---------- */
.hero-sam {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.sam-float {
    position: relative;
    z-index: 2;
    animation: sam-float 4s ease-in-out infinite;
    filter: drop-shadow(0 24px 60px rgba(0,240,255,0.4));
}
@keyframes sam-float {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-16px) rotate(2deg); }
}
.sam-glow {
    position: absolute;
    width: 360px; height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,240,255,0.45) 0%, rgba(175,82,222,0.25) 40%, transparent 70%);
    filter: blur(20px);
    animation: sam-glow 3s ease-in-out infinite alternate;
}
@keyframes sam-glow {
    from { transform: scale(1); opacity: 0.7; }
    to { transform: scale(1.15); opacity: 1; }
}

/* Scroll cue */
.hero-scroll-cue {
    position: absolute;
    bottom: var(--sp-6);
    left: 50%;
    transform: translateX(-50%);
    color: var(--c-text-3);
    font-size: var(--fs-xl);
    animation: bob 2s ease-in-out infinite;
    z-index: 3;
}
@keyframes bob {
    0%, 100% { transform: translate(-50%, 0); }
    50% { transform: translate(-50%, 8px); }
}

/* ---------- Section base ---------- */
.section {
    padding: var(--sp-24) var(--sp-4);
    position: relative;
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--sp-16);
}
.section-head h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-block: var(--sp-3);
    background: linear-gradient(135deg, var(--c-text-0) 0%, var(--c-neon-cyan) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-head p { font-size: var(--fs-lg); color: var(--c-text-2); }

/* ---------- Features grid ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--sp-6);
}
.feature-icon {
    width: 64px; height: 64px;
    border-radius: var(--r-lg);
    background: color-mix(in srgb, var(--c, var(--c-neon-cyan)) 20%, transparent);
    color: var(--c, var(--c-neon-cyan));
    display: grid;
    place-items: center;
    font-size: 28px;
    margin-bottom: var(--sp-4);
    box-shadow: 0 0 24px color-mix(in srgb, var(--c) 30%, transparent);
}

/* ---------- Chapter planets ---------- */
.section-chapters { background: linear-gradient(180deg, transparent, rgba(28,36,82,0.4), transparent); }

.chapters-path {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--sp-8);
    position: relative;
}
.chapters-path::before {
    content: "";
    position: absolute;
    top: 50%; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent, var(--c-chapter-1), var(--c-chapter-2),
        var(--c-chapter-3), var(--c-chapter-4), var(--c-chapter-5), transparent);
    filter: blur(1px);
    z-index: 0;
    opacity: 0.6;
}
@media (max-width: 700px) { .chapters-path::before { display: none; } }

.planet {
    text-align: center;
    padding: var(--sp-6) var(--sp-4);
    border-radius: var(--r-xl);
    background: var(--c-bg-1);
    border: 1px solid color-mix(in srgb, var(--chapter-color) 35%, transparent);
    box-shadow: 0 0 32px color-mix(in srgb, var(--chapter-color) 18%, transparent);
    transition: transform var(--dur-norm) var(--ease-spring), box-shadow var(--dur-norm);
    position: relative;
    z-index: 1;
}
.planet:hover {
    transform: translateY(-8px);
    box-shadow: 0 0 60px color-mix(in srgb, var(--chapter-color) 40%, transparent);
}
.planet-emoji { font-size: 48px; margin-bottom: var(--sp-3); }
.planet h3 { color: var(--chapter-color); font-size: var(--fs-lg); margin-bottom: 4px; }
.planet-sub { color: var(--c-text-3); font-size: var(--fs-sm); margin-bottom: var(--sp-3); }
.planet-levels { font-family: var(--font-num); color: var(--chapter-color); font-weight: var(--fw-bold); }
.planet-tier {
    display: inline-block; margin-top: var(--sp-2);
    padding: 2px var(--sp-3);
    border-radius: var(--r-full);
    background: color-mix(in srgb, var(--chapter-color) 25%, transparent);
    color: var(--c-text-0);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ---------- How it works ---------- */
.section-how { background: var(--c-bg-1); }
.how-list {
    list-style: none;
    display: grid;
    gap: var(--sp-8);
}
.how-list li {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: var(--sp-6);
    align-items: center;
}
@media (max-width: 560px) {
    .how-list li { grid-template-columns: 1fr; text-align: center; justify-items: center; }
}
.how-num {
    width: 80px; height: 80px;
    display: grid; place-items: center;
    border-radius: 50%;
    background: var(--grad-neon);
    color: var(--c-text-on-neon);
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: var(--fw-black);
    box-shadow: var(--glow-cyan);
}

/* ---------- Final CTA ---------- */
.section-final {
    text-align: center;
}
.section-final h2 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--sp-4);
}
.section-final p {
    font-size: var(--fs-lg);
    margin-bottom: var(--sp-8);
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s var(--ease-out-quart), transform 0.7s var(--ease-out-quart); }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Footer ---------- */
.site-footer {
    background: var(--c-bg-1);
    padding: var(--sp-16) var(--sp-4) var(--sp-8);
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: var(--sp-12);
}
.footer-grid {
    max-width: var(--container-max);
    margin-inline: auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--sp-8);
}
@media (max-width: 700px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-grid h4 {
    color: var(--c-neon-cyan);
    margin-bottom: var(--sp-3);
    font-size: var(--fs-md);
}
.footer-grid a {
    display: block;
    color: var(--c-text-2);
    margin-bottom: var(--sp-2);
    transition: color var(--dur-norm);
}
.footer-grid a:hover { color: var(--c-neon-magenta); }
.footer-bottom {
    max-width: var(--container-max);
    margin: var(--sp-8) auto 0;
    padding-top: var(--sp-4);
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    justify-content: space-between;
    color: var(--c-text-3);
    font-size: var(--fs-sm);
}

/* ---------- Top bar ---------- */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    z-index: 100;
    display: flex;
    align-items: center;
    padding: 0 var(--sp-6);
    backdrop-filter: blur(20px);
    background: rgba(6,8,24,0.7);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    transition: transform var(--dur-norm);
}
.topbar-inner {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
}
.topbar-brand {
    display: flex; align-items: center; gap: var(--sp-3);
    font-family: var(--font-display);
    font-weight: var(--fw-black);
    font-size: var(--fs-lg);
    color: var(--c-text-0);
}
.topbar-brand img { width: 40px; height: 40px; }
.topbar-actions { display: flex; gap: var(--sp-3); align-items: center; }