/* course.css — Die Brücke German Language School
   Architecture: mobile-first base → min-width breakpoints up
   ─────────────────────────────────────────────────────────── */

/* ── Reset ── */
*,
*::before,
*::after {
    box-sizing: border-box;   /* FIX #9: prevents padding/border from causing overflow */
}

/* ══════════════════════════════════════════════
   BASE  (320px — all phones)
══════════════════════════════════════════════ */
body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', Arial, sans-serif;
    background: #0d0e10;
    overflow-x: hidden;   /* FIX #10: prevents horizontal scroll */
}

/* ─── NAV ─── */
nav {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #000000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    padding: 1rem 1.25rem;   /* FIX #1: was 1.2rem 0 — added horizontal padding */
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;   /* logo left, actions right */
    width: 100%;
    max-width: 1200px;
    position: relative;              /* anchor for the mobile dropdown */
}

/* ── Logo link (Part 1) ── */
.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-link:focus-visible {
    outline: 2px solid #e5a900;
    outline-offset: 3px;
    border-radius: 4px;
}

.logo {
    height: 44px;      /* slightly reduced on mobile; restored at 900px */
    display: block;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-shrink: 0;
}

.school-name {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;    /* scaled for mobile; restored at 900px */
    font-weight: 200;
    color: #d49d2a;
    letter-spacing: 0.01em;
    white-space: nowrap;
    line-height: 1.3;
}

.school-sub {
    display: block;
    font-size: 0.78em;
    font-family: 'Inter', Arial, sans-serif;
    font-weight: 400;
    color: #ffffff;
    letter-spacing: 0.02em;
    margin-top: -1px;
    margin-left: 2px;
}

/* Nav links — FIX #3: hidden on mobile by default */
.nav-links {
    display: none;
    flex-direction: column;
    list-style: none;
    margin: 0;
    padding: 0;

    /* Mobile: absolute dropdown panel below the nav bar */
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    background: #000000;
    border-top: 1px solid rgba(229, 169, 0, 0.2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);

    /* Smooth slide-down animation */
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: max-height 0.35s ease, opacity 0.3s ease;
}

.nav-links.active {
    display: flex;
    max-height: 360px;
    opacity: 1;
}

.nav-links a {
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    color: #e9e9e9;
    padding: 1rem 1.5rem;
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: color 0.2s, background 0.2s;
    position: relative;   /* FIX #15: needed for ::after underline positioning */
}

.nav-links a:last-child {
    border-bottom: none;
}

.nav-links a::after {
    content: '';
    display: block;
    width: 0;
    height: 2px;
    background: #e5a900;
    transition: width 0.3s;
    position: absolute;
    left: 0;
    bottom: 0;
}

.nav-links a:hover {
    color: #e5a900;
    background: rgba(229, 169, 0, 0.05);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Nav actions wrapper */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

/* Enroll button — FIX #4: hidden on small screens; margin-left only on desktop */
.enroll-btn {
    display: none;    /* shown from 480px */
    background: linear-gradient(90deg, #e5a900 0%, #e7ae0f 100%);
    color: #fff;
    border: none;
    border-radius: 24px;
    padding: 0.6rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 183, 221, 0.08);
    transition: background 0.2s, transform 0.2s;
    outline: none;
    white-space: nowrap;
}

.enroll-btn:hover {
    background: linear-gradient(90deg, #e7ae0f 0%, #e5a900 100%);
    transform: translateY(-2px) scale(1.04);
}

/* ─── HAMBURGER ─── */
.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    padding: 7px;
    background: none;
    border: 1px solid rgba(229, 169, 0, 0.35);
    border-radius: 6px;
    cursor: pointer;
    flex-shrink: 0;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: #e5a900;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.25s ease;
    transform-origin: center;
}

/* Animated X state */
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ─── MAIN / HERO ─── */
main {
    text-align: center;
    padding: 2rem 1.25rem 1.5rem;
    color: #e9e9e9;
}

main h1 {
    text-align: center;
    font-size: clamp(1.4rem, 5vw, 2rem);   /* FIX #5: was fixed 2rem */
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: #e9e9e9;
}

main p {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    color: #c8c8c8;
    max-width: 580px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ─── PRICING SECTION ─── */
.pricing-section {
    max-width: 1100px;
    margin: 2rem auto 3rem;
    padding: 0 1.25rem;
}

.pricing-cards {
    display: flex;
    flex-direction: column;   /* FIX #6 mobile-first: stack on phones */
    align-items: center;
    gap: 2rem;
    /* flex-wrap was commented out — now irrelevant; handled by breakpoints */
}

/* ─── CARD ─── */
.card {
    background: #fff;
    border: 1px solid #e3e6eb;
    border-radius: 12px;
    padding: 30px;
    width: 100%;              /* FIX #7 + #14: fluid instead of fixed 320px */
    max-width: 360px;         /* keeps cards from being too wide on tablets */
    position: relative;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    overflow: visible;        /* FIX #11: ensure .badge isn't clipped */
}

.card:hover {
    transform: translateY(-5px);
}

.card.popular {
    border: 2px solid #d47f2a;
    background: #fff8f0;
}

.badge {
    position: absolute;
    top: -13px;
    left: 50%;
    transform: translateX(-50%);
    background: #d47f2a;
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 5px 12px;
    border-radius: 20px;
    white-space: nowrap;
}

.level {
    color: #e87a00;
    font-weight: 600;
    margin-bottom: 10px;
}

.card h2 {
    font-size: 1.3rem;
    margin: 0.5rem 0 0.75rem;
    color: #1a1a2e;
}

.desc {
    color: #555;
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.details,
.features {
    list-style: none;
    padding: 0;
    margin: 10px 0;
    text-align: left;
}

.details li,
.features li {
    margin: 6px 0;
    font-size: 0.95rem;
    color: #333;
    line-height: 1.5;
}

.price {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 20px 0;
    color: #1a1a2e;
}

.enroll {
    background: #1d2430;
    color: #fff;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
    font-weight: 500;
    width: 100%;
}

.enroll:hover {
    background: #2d3a50;
}

.highlight {
    background: linear-gradient(90deg, #e87a00, #d49d2a);
}

.highlight:hover {
    background: linear-gradient(90deg, #d47f2a, #b37400);
}

/* ══════════════════════════════════════════════
   BREAKPOINT — 480px  (large phones)
══════════════════════════════════════════════ */
@media (min-width: 480px) {
    nav {
        padding: 1rem 1.75rem;
    }

    .enroll-btn {
        display: block;    /* show enroll button on larger phones */
    }

    main {
        padding: 2.5rem 1.5rem 1.5rem;
    }

    main h1 {
        margin-top: 2rem;
    }

    .pricing-section {
        padding: 0 1.5rem;
        margin-top: 2.5rem;
    }
}

/* ══════════════════════════════════════════════
   BREAKPOINT — 640px  (phablets)
══════════════════════════════════════════════ */
@media (min-width: 640px) {
    /* Two-column card layout on tablet —
       FIX #6: was no intermediate state between full-row and full-stack */
    .pricing-cards {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: flex-start;
        gap: 1.5rem;
    }

    .card {
        width: calc(50% - 1rem);
        max-width: 340px;
    }
}

/* ══════════════════════════════════════════════
   BREAKPOINT — 900px  (tablet landscape / desktop nav)
══════════════════════════════════════════════ */
@media (min-width: 900px) {
    nav {
        padding: 1.2rem 2rem;
    }

    /* Show desktop nav links inline */
    .nav-links {
        display: flex !important;   /* override mobile hidden */
        flex-direction: row;
        position: static;
        background: none;
        border: none;
        box-shadow: none;
        max-height: none;
        opacity: 1;
        overflow: visible;
        gap: 2.7rem;
    }

    .nav-links a {
        padding: 0;
        border-bottom: none;
        font-size: 1rem;
    }

    .nav-links a:hover {
        background: none;
    }

    /* Hide hamburger on desktop */
    .hamburger {
        display: none;
    }

    /* Restore original desktop sizing */
    .logo {
        height: 52px;
    }

    .logo-group {
        gap: 1.2rem;
        margin-right: 3.5rem;
    }

    .school-name {
        font-size: 1.35rem;
    }

    .enroll-btn {
        display: block;
        margin-left: 3.5rem;   /* original desktop spacing restored here only */
        padding: 0.7rem 1.7rem;
        font-size: 1.1rem;
    }

    main {
        padding: 4rem 1rem 2rem;
    }

    main h1 {
        font-size: 2rem;
        margin-top: 40px;
    }

    .pricing-section {
        margin: 50px auto;
        padding: 20px;
    }

    /* Three-column card layout on desktop */
    .pricing-cards {
        flex-wrap: nowrap;
        gap: 30px;
    }

    .card {
        width: 320px;
        max-width: none;
    }
}

/* ══════════════════════════════════════════════
   BREAKPOINT — 1025px  (wide desktop)
══════════════════════════════════════════════ */
@media (min-width: 1025px) {
    nav {
        padding: 1.2rem 3rem;
    }

    .pricing-section {
        padding: 20px;
    }
}