/* ============================================================
   LUMEXI – SECTIONS
   Hero, Features, Tutor, Lektionen, Übungen, Fortschritt,
   Steps, Showcase, Audience, Sprachen, CTA
   ============================================================ */

/* ---------- Hero ---------- */
.hero {
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding-block: 8rem 5rem;
    overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    will-change: transform;
}
.hero-glow.g1 {
    width: 640px; height: 640px;
    top: -220px; left: -160px;
    background: radial-gradient(circle, rgba(139, 157, 255, 0.16), transparent 65%);
    animation: glowDrift 16s ease-in-out infinite alternate;
}
.hero-glow.g2 {
    width: 520px; height: 520px;
    bottom: -180px; right: -120px;
    background: radial-gradient(circle, rgba(110, 231, 244, 0.1), transparent 65%);
    animation: glowDrift 20s ease-in-out infinite alternate-reverse;
}
.hero-grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 30%, transparent 75%);
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: clamp(2.5rem, 6vw, 5rem);
    position: relative;
}
.hero-copy .badge {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 1rem 0.4rem 0.6rem;
    border-radius: 99px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: rgba(139, 157, 255, 0.08);
    border: 1px solid rgba(139, 157, 255, 0.28);
    margin-bottom: 1.6rem;
}
.hero-copy .badge .badge-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--color-accent-2);
    box-shadow: 0 0 10px rgba(110, 231, 244, 0.9);
    animation: statusBlink 2.6s ease-in-out infinite;
}
.hero-title {
    font-size: var(--fs-hero);
    line-height: 1.06;
    margin-bottom: 1.4rem;
}
.hero-title em {
    font-style: normal;
    background: linear-gradient(100deg, var(--color-accent) 5%, var(--color-accent-2) 90%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.hero-desc {
    font-size: clamp(1rem, 1.6vw, 1.15rem);
    color: var(--color-text-muted);
    max-width: 480px;
    margin-bottom: 2.2rem;
}
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 2.6rem; }
.hero-actions .btn svg { width: 17px; height: 17px; }

.hero-platforms {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--color-text-faint);
    font-size: var(--fs-small);
}
.hero-platforms .pf-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}
.hero-platforms svg { width: 14px; height: 14px; }

.hero-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
    position: relative;
}
.hero-visual .hero-bubble {
    animation: heroBubbleFloat 7s ease-in-out infinite;
}
.hero-visual .phone {
    width: min(270px, 70vw);
    margin-top: -1rem;
    animation: heroPhoneFloat 9s ease-in-out infinite;
}

/* ---------- Features (Bento, 2 Reihen) ---------- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-gap);
}
.feature-panel {
    position: relative;
    padding: clamp(1.8rem, 4vw, 2.8rem);
    border-radius: var(--radius-large);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: border-color 0.4s;
}
.feature-panel:hover { border-color: rgba(139, 157, 255, 0.28); }
.feature-panel::before {
    content: "";
    position: absolute;
    top: -1px; left: 15%;
    width: 70%; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 157, 255, 0.5), transparent);
    opacity: 0;
    transition: opacity 0.4s;
}
.feature-panel:hover::before { opacity: 1; }
.feature-panel h3 { font-size: var(--fs-h2); margin-bottom: 0.7rem; position: relative; }
.feature-panel > p { color: var(--color-text-muted); margin-bottom: 1.6rem; max-width: 46ch; position: relative; }
.feature-panel .panel-visual { position: relative; margin-top: 1.8rem; }

.feature-panel.wide { grid-column: 1 / -1; }
.feature-panel.panel-tutor {
    background:
        radial-gradient(ellipse 60% 80% at 85% 20%, rgba(139, 157, 255, 0.08), transparent),
        var(--color-surface);
}
.feature-panel.panel-editor {
    background:
        radial-gradient(ellipse 70% 90% at 15% 100%, rgba(110, 231, 244, 0.06), transparent),
        var(--color-surface);
}
.feature-panel.panel-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 2rem; align-items: center; }
.feature-panel.panel-split .panel-visual { margin-top: 0; }

/* ---------- Tutor-Sektion ---------- */
.tutor-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    gap: clamp(2.5rem, 6vw, 4.5rem);
    align-items: center;
}
.tutor-visual { display: flex; flex-direction: column; gap: 1.6rem; }
.bubble-stage .ai-bubble { --bubble-size: clamp(120px, 17vw, 160px); }
.tutor-capabilities {
    display: grid;
    gap: 0.7rem;
    margin-top: 2rem;
}
.tutor-capabilities .cap {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 1rem 1.2rem;
    border-radius: var(--radius-medium);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.92rem;
    transition: border-color 0.3s, transform 0.3s var(--ease-out);
}
.tutor-capabilities .cap:hover { border-color: rgba(139, 157, 255, 0.35); transform: translateX(4px); }
.tutor-capabilities .cap .cap-icon {
    width: 34px; height: 34px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    border: 1px solid rgba(139, 157, 255, 0.3);
}
.tutor-capabilities .cap .cap-icon svg { width: 16px; height: 16px; }
.tutor-capabilities .cap strong { color: var(--color-text); font-weight: 600; margin-right: 0.35rem; }

/* ---------- Lektionen ---------- */
.lessons-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(2.5rem, 6vw, 4rem);
    align-items: center;
}

/* ---------- Übungen ---------- */
.exercise-note {
    margin-top: 1.4rem;
    font-size: var(--fs-small);
    color: var(--color-text-faint);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ---------- Steps ---------- */
.steps-section { background: linear-gradient(180deg, transparent, rgba(139, 157, 255, 0.025), transparent); }

/* ---------- Showcase ---------- */
.showcase-section { overflow: hidden; }

/* ---------- CTA-Note unter Übungen / rechtliches Panel ---------- */
.premium-note {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-top: clamp(2.5rem, 6vw, 4rem);
    padding: 1.5rem 1.7rem;
    border-radius: var(--radius-medium);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    max-width: 760px;
}
.premium-note .pn-icon {
    flex-shrink: 0;
    width: 36px; height: 36px;
    border-radius: 11px;
    display: grid;
    place-items: center;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    border: 1px solid rgba(139, 157, 255, 0.3);
}
.premium-note .pn-icon svg { width: 17px; height: 17px; }
.premium-note strong { color: var(--color-text); }