:root {
    --bg: #fff9f2;
    --bg-card: #ffffff;
    --bg-card-alt: #fff3e0;
    --text: #4a4036;
    --text-light: #8c8175;
    --primary: #ffb347;
    --primary-dark: #e59424;
    --accent-green: #a7f3d0;
    --accent-green-text: #065f46;
    --accent-blue: #bfdafe;
    --accent-blue-text: #1e40af;
    --border: #ebe0d3;
    --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.08);
    --radius-lg: 20px;
    --radius-pill: 999px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Nunito', 'Baloo 2', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

header {
    position: static;
    top: 0;
    z-index: 10;
    background: linear-gradient(120deg, #ffb347, #ff9e2c);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    color: #fff;
    box-shadow: var(--shadow-soft);
}

.logo {
    font-weight: 800;
    font-size: 1.4rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.logo::before {
    content: "🎓";
    font-size: 1.4rem;
}

header  {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
/* Reset button font inside header nav */
header nav button {
    font: inherit;
}

/* Make all nav items consistent */
header nav a,
header nav .nav-link,
header nav .nav-dropdown-toggle {
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;  /* or 1rem if you prefer */
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.1s ease, background 0.15s ease, box-shadow 0.12s ease;
    cursor: pointer;
}

header nav a,
header nav .nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-weight: 700;
    border: 2px solid transparent;
    transition: transform 0.1s ease, background 0.15s ease, box-shadow 0.12s ease;
}

header nav a:hover,
header nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.12);
}

.nav-standalone-link {
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: #fff;
    color: #000;
    font-weight: 800;
    box-shadow: 0 10px 18px rgba(0,0,0,0.12);
    border: none;
}

.nav-standalone-link:hover {
    background: var(--primary);
}



header nav .nav-dropdown {
    position: relative;
    display: inline-flex; /* this is fine to keep */
}

header nav .nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;          /* was: calc(100% + 2px) */
    left: 0;
    min-width: 100%;    /* was: 180px */
    box-sizing: border-box;
    background: #fff;
    color: var(--text);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    padding: 10px;
    flex-direction: column;
    gap: 6px;
    z-index: 25;
    border: 2px solid rgba(0,0,0,0.03);
}


header nav .nav-dropdown-toggle {
    appearance: none;
    cursor: pointer;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.12);
    border: 2px solid transparent; /* same thickness as links */
    font-weight: 700;
    color: #fff;
    transition: transform 0.1s ease, background 0.15s ease, box-shadow 0.12s ease;
}

header nav .nav-dropdown:hover .nav-dropdown-menu,
header nav .nav-dropdown:focus-within .nav-dropdown-menu {
    display: flex;
}

header nav .nav-dropdown-menu a {
    background: transparent;
    color: var(--text);
    padding: 8px 10px;
    border-radius: 12px;
    transition: background 0.12s ease, transform 0.1s ease;
}

header nav .nav-dropdown-menu a:hover {
    background: rgba(0,0,0,0.05);
    transform: translateY(-1px);
}

.nav-cta {
    background: #fff;
    color: #000;
    font-weight: 800;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.13);
}

.nav-cta:hover {
    background: var(--primary);
    color: #fff;
}

main {
    display: block;
}

.content {
    max-width: 1200px;
    margin: 24px auto 40px;
    padding: 0 16px;
}

.card {
    background: var(--bg-card);
    padding: 20px 20px 22px;
    margin-bottom: 18px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 2px solid rgba(0, 0, 0, 0.03);
}

.btn,
.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 18px;
    border-radius: var(--radius-pill);
    font-size: 0.95rem;
    border: 0;
    cursor: pointer;
    text-decoration: none;
    font-weight: 800;
    transition: transform 0.1s ease, box-shadow 0.12s ease, background 0.12s ease, color 0.12s ease;
}

.btn {
    background: #fff;
    color: var(--text);
    border: 2px solid var(--text);
    box-shadow: 0 8px 14px rgba(0,0,0,0.1);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 18px rgba(255, 179, 71, 0.4);
}

.btn-ghost {
    background: #fff;
    color: var(--text);
    border: 2px solid var(--border);
    box-shadow: 0 6px 12px rgba(0,0,0,0.08);
}

.btn:hover,
.btn-primary:hover,
.btn-ghost:hover {
    transform: translateY(-2px);
}

.pill {
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.9);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.section {
    padding: 26px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.section-header span {
    color: var(--text-light);
    font-size: 0.95rem;
}

.lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
}

.lesson-card {
    background: #fff;
    border-radius: 24px;
    border: 2px solid var(--border);
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 3px 3px 0 #ebe0d3;
    transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}

.lesson-card:hover {
    transform: translateY(-3px);
    box-shadow: 6px 6px 0 #ebe0d3;
    border-color: var(--primary);
}

.card-content {
    padding: 4px 6px 12px;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lesson-title {
    font-size: 1.1rem;
    font-weight: 800;
    margin: 0;
}

.lesson-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    margin: 0 0 10px;
    flex: 1 1 auto;
}

.card-footer {
    margin-top: auto;
}

.thumb-wrapper {
    width: 100%;
    height: 170px;
    border-radius: 18px;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.lesson-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.tag-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.badge-topic,
.badge-grammar {
    font-size: 0.8rem;
    padding: 5px 12px;
    border-radius: var(--radius-pill);
    font-weight: 800;
}

.badge-topic {
    background: var(--accent-green);
    color: var(--accent-green-text);
}

.badge-grammar {
    background: var(--accent-blue);
    color: var(--accent-blue-text);
}

.badge-level {
    padding: 5px 10px;
    border-radius: var(--radius-pill);
    font-size: 0.85rem;
    background: rgba(0,0,0,0.05);
    border: 2px solid rgba(0,0,0,0.05);
    font-weight: 800;
}

.start-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--text);
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    background: #fff;
    border: 2px solid var(--text);
}

.start-link:hover {
    background: var(--text);
    color: #fff;
}

footer {
    padding: 18px 24px 26px;
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
    margin-top: 16px;
}

/* Default: show nav, hide toggle (desktop) */
.nav-toggle {
    display: none;
}

/* Mobile layout */
@media (max-width: 700px) {
    header {
        flex-wrap: wrap;
        gap: 8px;
    }

    .logo {
        flex: 1 1 auto;
    }

    /* Show the menu button on mobile */
    .nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 8px 14px;
        border-radius: var(--radius-pill);
        border: 2px solid rgba(255,255,255,0.6);
        background: rgba(255,255,255,0.12);
        color: #fff;
        font-weight: 800;
        cursor: pointer;
    }

    /* Put the Preply CTA on its own row or hide if you prefer */
    .nav-standalone-link {
        order: 3;
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    header nav {
        /* hidden by default on mobile */
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 6px;
        padding-top: 8px;
    }

    /* When JS adds .is-open, show the menu */
    header nav.is-open {
        display: flex;
    }

    header nav a,
    header nav .nav-link {
        width: 100%;
        justify-content: flex-start;
    }

    /* Resources dropdown: behave like a nested list instead of floating */
    header nav .nav-dropdown {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    header nav .nav-dropdown-toggle {
        width: 100%;
        justify-content: space-between;
    }

    header nav .nav-dropdown-menu {
        position: static;
        min-width: 100%;
        box-shadow: none;
        background: transparent;
        border: 0;
        padding: 4px 0 0;
        display: none; /* hidden until .is-open on parent */
    }

    header nav .nav-dropdown-menu a {
        padding-left: 24px; /* indent children a bit */
        background: rgba(255,255,255,0.06);
        border-radius: var(--radius-pill);
    }

    /* When JS toggles .is-open on nav-dropdown, show submenu */
    header nav .nav-dropdown.is-open .nav-dropdown-menu {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
}