:root {
    --bg: #0b0f1d;
    --bg-soft: #11182d;
    --card: rgba(255,255,255,0.06);
    --card-border: rgba(255,255,255,0.12);
    --text: #f4f7fb;
    --muted: #b5bfd4;
    --primary: #7c5cff;
    --primary-2: #32c5ff;
    --accent: #d946ef;
    --success: #18c37e;
    --danger: #ff5b6e;
    --radius: 20px;
    --shadow: 0 20px 60px rgba(0,0,0,0.28);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(124,92,255,0.25), transparent 30%),
        radial-gradient(circle at top right, rgba(50,197,255,0.16), transparent 28%),
        linear-gradient(180deg, #070b16 0%, #0b0f1d 100%);
    color: var(--text);
    font-family: Inter, Arial, sans-serif;
    line-height: 1.6;
}

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

.container {
    width: min(1180px, 92%);
    margin: 0 auto;
}

.section {
    padding: 72px 0;
}

.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(14px);
    background: rgba(8, 12, 24, 0.72);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 82px;
}

.site-logo {
    max-height: 56px;
    width: auto;
    display: block;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 22px;
    padding: 0;
    margin: 0;
}

.nav-menu li a {
    color: var(--muted);
    font-weight: 500;
}

.nav-menu li a:hover,
.nav-menu li.current-menu-item a {
    color: #fff;
}

.header-actions {
    display: flex;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 12px 20px;
    font-weight: 700;
    border: 1px solid transparent;
    transition: 0.25s ease;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary), var(--primary-2));
    color: #fff;
    box-shadow: 0 10px 30px rgba(124, 92, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-1px);
    opacity: 0.95;
}

.btn-secondary {
    background: rgba(255,255,255,0.04);
    color: #fff;
    border-color: rgba(255,255,255,0.14);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.08);
}

.hero-section {
    padding: 90px 0 60px;
}

.hero-grid,
.grid-2,
.grid-3,
.dashboard-grid,
.video-grid,
.form-grid {
    display: grid;
    gap: 24px;
}

.video-desc {
    color: var(--muted);
    margin-top: 14px;
    font-size: 0.96rem;
}

.hero-grid {
    grid-template-columns: 1.25fr 0.9fr;
    align-items: center;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

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

.dashboard-grid,
.video-grid {
    grid-template-columns: repeat(2, 1fr);
}

.form-grid {
    grid-template-columns: repeat(2, 1fr);
}

.eyebrow {
    display: inline-block;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(124,92,255,0.12);
    border: 1px solid rgba(124,92,255,0.22);
    color: #dcd7ff;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero-section h1,
.content-card h1 {
    font-size: clamp(2rem, 4vw, 3.8rem);
    line-height: 1.08;
    margin: 0 0 18px;
}

.hero-subtitle {
    font-size: 1.08rem;
    color: var(--muted);
    max-width: 720px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.glass-card,
.content-card,
.course-card,
.resource-card,
.video-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.glass-card,
.course-card,
.resource-card,
.video-card {
    padding: 24px;
}

.content-card {
    padding: 34px;
}

.section-heading {
    margin-bottom: 32px;
}

.section-heading h2 {
    margin: 0;
    font-size: clamp(1.6rem, 3vw, 2.6rem);
}

.feature-list,
.footer-links,
.steps-list {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.notice-box {
    margin-top: 16px;
    padding: 16px 18px;
    border-radius: 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--muted);
}

.notice-box.success {
    border-color: rgba(24,195,126,0.32);
    background: rgba(24,195,126,0.08);
    color: #dff9ee;
}

.video-placeholder {
    min-height: 220px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: rgba(255,255,255,0.04);
    border: 1px dashed rgba(255,255,255,0.18);
    color: var(--muted);
    margin-top: 12px;
}

.styled-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.styled-form input,
.styled-form textarea,
.styled-form select {
    width: 100%;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-radius: 14px;
    padding: 14px 16px;
    outline: none;
}

.styled-form input::placeholder,
.styled-form textarea::placeholder {
    color: #9ba7c2;
}

.checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}

.auth-card {
    max-width: 760px;
    margin: 0 auto;
}

.site-footer {
    padding: 60px 0 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
    background: rgba(3, 7, 16, 0.5);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr;
    gap: 24px;
}

.footer-bottom {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.08);
    color: var(--muted);
}

.cta-band {
    padding-top: 20px;
}

.cta-card {
    text-align: center;
}

.entry-content {
    color: var(--muted);
}

@media (max-width: 1024px) {
    .hero-grid,
    .grid-2,
    .grid-3,
    .dashboard-grid,
    .video-grid,
    .footer-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .header-inner {
        flex-wrap: wrap;
        padding: 14px 0;
    }

    .main-nav {
        width: 100%;
    }

    .nav-menu {
        flex-wrap: wrap;
        gap: 14px;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 640px) {
    .content-card,
    .glass-card,
    .course-card,
    .resource-card,
    .video-card {
        padding: 20px;
    }

    .hero-section h1,
    .content-card h1 {
        font-size: 2rem;
    }

    .btn {
        width: 100%;
    }

    .hero-actions,
    .header-actions {
        flex-direction: column;
    }
}

.gptea-course-links-wrap {
    margin-top: 24px;
}

.gptea-course-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 24px;
}

.gptea-course-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.gptea-course-card h3 {
    margin-top: 0;
    margin-bottom: 14px;
}

.gptea-course-link-input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.06);
    color: #fff;
    margin-bottom: 14px;
}

.gptea-course-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

@media (max-width: 1024px) {
    .gptea-course-links-grid {
        grid-template-columns: 1fr;
    }
}