/* ============================================================
   Programming Criterion — Global Theme
   Palette: Sage Green #74C69D | Forest #2D6A4F | Charcoal #0B1014 | Gold #F5C518
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700;900&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- CSS Variables ---------- */
:root {
    --den-bg-darkest: #07100B;
    --den-bg-dark: #0B1712;
    --den-bg-card: #13241C;
    --den-bg-card-hover: #1A3127;
    --den-green-deep: #2D6A4F;
    --den-green-main: #52B788;
    --den-green-light: #74C69D;
    --den-green-glow: rgba(82, 183, 136, 0.35);
    --den-violet-accent: #8B6FB8;       /* muted plum-violet — secondary accent only */
    --den-violet-soft: #B39DDB;
    --den-gold: #F5C518;
    --den-gold-soft: #FFD966;
    --den-text-primary: #FAF8F1;
    --den-text-secondary: #B8C9BE;
    --den-text-muted: #7A8F82;
    --den-border: rgba(82, 183, 136, 0.22);
    --den-radius: 16px;
    --den-radius-sm: 8px;
    --den-shadow-card: 0 8px 40px rgba(45, 106, 79, 0.2);
    --den-shadow-glow: 0 0 60px rgba(82, 183, 136, 0.3);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', system-ui, sans-serif;
}

/* ---------- Base Reset ---------- */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--den-bg-darkest);
    color: var(--den-text-primary);
    font-family: var(--font-body);
    scroll-behavior: smooth;
    overflow-x: hidden;
    max-width: 100vw;
    -webkit-font-smoothing: antialiased;
}

img, iframe, video {
    max-width: 100%;
}

/* ============================================================
   LANDING / SPLASH PAGE
   ============================================================ */
.landing-wrapper {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse at 60% 30%, #1A4A38 0%, #0B1712 55%, #07100B 100%);
    cursor: pointer;
}

.landing-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: var(--den-green-main);
    opacity: 0;
    animation: floatParticle var(--dur, 8s) ease-in-out infinite var(--delay, 0s);
}

@keyframes floatParticle {
    0%   { opacity: 0; transform: translateY(100vh) scale(0); }
    10%  { opacity: 0.6; }
    90%  { opacity: 0.2; }
    100% { opacity: 0; transform: translateY(-20vh) scale(1.5); }
}

.landing-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 2rem;
    max-width: 800px;
    animation: fadeSlideUp 1.2s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.landing-badge {
    display: inline-block;
    background: rgba(82, 183, 136, 0.18);
    border: 1px solid var(--den-green-main);
    color: var(--den-green-light);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.landing-headline {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 900;
    line-height: 1.2;
    color: var(--den-text-primary);
    margin: 0 0 1.5rem 0;
}

.landing-headline .highlight {
    background: linear-gradient(135deg, var(--den-gold) 0%, var(--den-green-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-subtext {
    font-size: 1.1rem;
    color: var(--den-text-secondary);
    line-height: 1.7;
    margin-bottom: 2.5rem;
}

.landing-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--den-green-main), var(--den-green-deep));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 30px var(--den-green-glow);
    letter-spacing: 0.03em;
    animation: pulseGlow 3s ease-in-out infinite;
}

.landing-cta-btn:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 8px 50px rgba(82, 183, 136, 0.55);
}

.landing-scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--den-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: bounceY 2s ease-in-out infinite;
}

/* ============================================================
   HERO SECTION (extracted from inline styles)
   ============================================================ */
.hero-section {
    min-height: 85vh;
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 13rem 1rem 8rem;
        box-sizing: border-box;
}

.hero-inner {
    max-width: 800px;
    width: 100%;
    animation: fadeSlideUp 1s ease both;
}

.hero-secondary-btn {
    display: inline-flex;
    align-items: center;
    padding: 16px 36px;
    border: 1px solid rgba(108, 61, 232, 0.5);
    color: var(--den-green-light);
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    background: transparent;
}

.hero-secondary-btn:hover {
    background: rgba(108, 61, 232, 0.1);
    transform: translateY(-2px);
}

/* ============================================================
   MAIN LAYOUT
   ============================================================ */
.main-layout {
    min-height: 100vh;
    background: var(--den-bg-darkest);
    /*margin-top: 68px;*/
}

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(7, 16, 11, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--den-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 3rem;
    min-height: 64px;
}

.nav-logo {
    height: 40px;
    width: auto;
    display: block;
    cursor: pointer;
}

.nav-logo span {
    color: var(--den-green-light);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link-btn {
    background: none;
    border: none;
    color: var(--den-text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    padding: 6px 0;
    transition: color 0.25s;
    position: relative;
}

.nav-link-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--den-green-main);
    transition: width 0.25s;
}

.nav-link-btn:hover {
    color: var(--den-text-primary);
}

.nav-link-btn:hover::after {
    width: 100%;
}

.nav-cta {
    background: linear-gradient(135deg, var(--den-green-main), var(--den-green-deep));
    color: white;
    border: none;
    border-radius: 50px;
    padding: 8px 22px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 2px 20px var(--den-green-glow);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(82, 183, 136, 0.5);
}

/* ============================================================
   PAGE SECTIONS
   ============================================================ */
.page-section {
    padding: 10rem 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.section-badge {
    display: inline-block;
    background: rgba(82, 183, 136, 0.1);
    border: 1px solid var(--den-border);
    color: var(--den-green-light);
    padding: 5px 18px;
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.2rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    color: var(--den-text-primary);
    line-height: 1.2;
    margin: 0 0 1rem 0;
}

.section-title .accent {
    background: linear-gradient(135deg, var(--den-green-light), var(--den-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    color: var(--den-text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 650px;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 4rem;
    align-items: center;
}

.about-image-col {
    display: flex;
    justify-content: center;
}

.about-img-wrapper {
    width: 100%;
    max-width: 100%;
}

.about-avatar-frame {
    position: relative;
    width: 280px;
    height: 280px;
}

.about-avatar-ring {
    position: absolute;
    top: -6px;
    left: -6px;
    right: -6px;
    bottom: -6px;
    border-radius: 50%;
    background: conic-gradient(var(--den-green-main), var(--den-gold), var(--den-violet-accent), var(--den-green-main));
    animation: rotateSlow 6s linear infinite;
}

.about-avatar-inner {
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    background: var(--den-bg-card);
    overflow: hidden;
    margin: auto;
    top: 1px;
    left: 1px;
    right: 1px;
    bottom: 1px;
}

.about-avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--den-green-deep) 0%, var(--den-bg-card) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--den-text-muted);
    font-size: 0.8rem;
    text-align: center;
}

.about-avatar-icon {
    font-size: 4rem;
    filter: drop-shadow(0 0 20px var(--den-green-glow));
}

.about-stats {
    display: flex;
    gap: 1rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

.stat-chip {
    background: var(--den-bg-card);
    border: 1px solid var(--den-border);
    border-radius: 12px;
    padding: 14px 20px;
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.stat-chip-number {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--den-gold);
    display: block;
    line-height: 1;
}

.stat-chip-label {
    font-size: 0.72rem;
    color: var(--den-text-muted);
    margin-top: 4px;
    letter-spacing: 0.08em;
    display: block;
}

.about-text-col .section-description {
    margin-bottom: 1rem;
}

.clients-section {
    width: 100%;
    padding: 2.5rem 2rem;
    background: #FAF8F1;
    border-top: 1px solid var(--den-border, rgba(255, 255, 255, 0.08));
    border-bottom: 1px solid var(--den-border, rgba(255, 255, 255, 0.08));
}

.client-marquee {
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(
        to right,
        transparent 0,
        black 80px,
        black calc(100% - 80px),
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0,
        black 80px,
        black calc(100% - 80px),
        transparent 100%
    );
}

.client-track {
    display: flex;
    /* remove gap */
    width: max-content;
    animation: scroll-logos 30s linear infinite;
}

@keyframes scroll-logos {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.client-logo {
    height: 76px;
    width: auto;
    display: block;
    padding: 0.75rem 1.25rem;
    background: #FAF8F1;
    border-radius: var(--den-radius-sm);
    box-sizing: content-box;
    flex-shrink: 0;
    margin-right: 3.5rem;  /* spacing via margin instead of gap */
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
}
.clients-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.clients-label {
    color: var(--den-text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.client-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 4.5rem;
}


/*.client-logo:hover {
    opacity: 1;
}*/

/* ============================================================
   COURSE SECTION (extracted from inline styles)
   ============================================================ */
.goal-box {
    background: var(--den-bg-card);
    border: 1px solid var(--den-border);
    border-left: 4px solid var(--den-gold);
    border-radius: var(--den-radius);
    padding: 2rem;
    margin-top: 2.5rem;
}

.goal-title {
    color: var(--den-gold);
    margin: 0 0 0.75rem 0;
    font-family: var(--font-display);
    font-size: 1.2rem;
}

.goal-text {
    color: var(--den-text-secondary);
    line-height: 1.8;
    margin: 0;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2.5rem;
}

.topic-chip {
    background: var(--den-bg-card);
    border: 1px solid var(--den-border);
    border-radius: 10px;
    padding: 1rem;
    color: var(--den-text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    transition: all 0.3s;
    cursor: default;
}

.topic-chip:hover {
    border-color: var(--den-green-main);
    color: var(--den-text-primary);
    background: var(--den-bg-card-hover);
}

/* ============================================================
   SHOWCASE IFRAME
   ============================================================ */
.showcase-section {
    width: 100%;
    padding: 0;
    margin: 0;
}

.showcase-iframe {
    width: 100%;
    height: 600px;
    border: none;
    display: block;
}

/* ============================================================
   WHY US / CARDS
   ============================================================ */
.full-width-section {
    background: linear-gradient(180deg, var(--den-bg-darkest) 0%, var(--den-bg-dark) 50%, var(--den-bg-darkest) 100%);
    padding: 7rem 2rem;
    align-self: center;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--den-bg-card);
    border: 1px solid var(--den-border);
    border-radius: var(--den-radius);
    padding: 2rem;
    transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--den-green-main), var(--den-gold));
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--den-green-main);
    box-shadow: var(--den-shadow-card);
    background: var(--den-bg-card-hover);
}

.feature-card:hover::before { opacity: 1; }

.card-icon {
    font-size: 2.4rem;
    margin-bottom: 1.2rem;
    display: block;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--den-text-primary);
    margin: 0 0 0.75rem 0;
}

.card-body {
    color: var(--den-text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ============================================================
   BATCH DETAILS
   ============================================================ */
.batch-section {
    padding: 7rem 2rem;
    background: var(--den-bg-darkest);
}

.batch-inner {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}

.batch-card {
    max-width: 900px;
    margin: 3rem auto 0;
    background: var(--den-bg-card);
    border: 1px solid var(--den-green-main);
    border-radius: var(--den-radius);
    padding: 3rem;
    box-shadow: var(--den-shadow-glow);
    position: relative;
    overflow: hidden;
}

.batch-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(82, 183, 136, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.batch-name-tag {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    color: var(--den-text-primary);
    margin: 0 0 2rem 0;
}

.batch-name-tag span {
    color: var(--den-gold);
}

.batch-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.batch-detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.batch-detail-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--den-text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.batch-detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--den-text-primary);
}

.batch-highlights-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 1.5rem;
}

.highlight-chip {
    background: rgba(139, 111, 184, 0.14);
    border: 1px solid rgba(139, 111, 184, 0.38);
    color: var(--den-violet-soft);
    border-radius: 50px;
    padding: 5px 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ============================================================
   REGISTRATION SECTION
   ============================================================ */
.registration-section {
    padding: 7rem 2rem;
    background: linear-gradient(180deg, var(--den-bg-darkest) 0%, #0D1A14 100%);
    align-self: center;
}

.registration-wrapper {
    max-width: 560px;
    margin: 0 auto;
}

.reg-form-card {
    background: var(--den-bg-card);
    border: 1px solid var(--den-border);
    border-radius: var(--den-radius);
    padding: 3rem;
    box-shadow: var(--den-shadow-card);
}

.reg-form-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--den-text-primary);
    margin: 0 0 0.5rem 0;
    text-align: center;
}

.reg-form-sub {
    color: var(--den-text-secondary);
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Vaadin text field overrides */
.den-field {
    --vaadin-input-field-background: #1A3127;
    --vaadin-input-field-focused-background: #1E3A2E;
    --vaadin-input-field-border-color: rgba(82, 183, 136, 0.35);
    --vaadin-input-field-focused-border-color: #52B788;
    --vaadin-input-field-value-color: #FAF8F1;
    --vaadin-input-field-placeholder-color: #7A8F82;
    --vaadin-input-field-label-color: #B8C9BE;
    width: 100%;
    margin-bottom: 1rem;
}

.den-submit-btn {
    width: 100%;
    margin-top: 1rem;
    height: 52px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--den-green-main), var(--den-green-deep));
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 20px var(--den-green-glow);
}

.den-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 35px rgba(82, 183, 136, 0.5);
}

.notification-success {
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.4);
    color: #86EFAC;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
    animation: fadeSlideUp 0.5s ease both;
}

.notification-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #FCA5A5;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
    animation: shake 0.4s ease both;
}

/* ============================================================
   FOOTER
   ============================================================ */
.den-footer {
    background: var(--den-bg-darkest);
    border-top: 1px solid var(--den-border);
    text-align: center;
    padding: 2.5rem;
    align-self: center;
    color: var(--den-text-muted);
    font-size: 0.82rem;
}

.den-footer strong {
    color: var(--den-gold);
}

/* ============================================================
   KEYFRAME ANIMATIONS
   ============================================================ */
@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 4px 30px rgba(82, 183, 136, 0.35); }
    50%       { box-shadow: 0 6px 50px rgba(82, 183, 136, 0.65); }
}

@keyframes rotateSlow {
    to { transform: rotate(360deg); }
}

@keyframes bounceY {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(8px); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25%       { transform: translateX(-6px); }
    75%       { transform: translateX(6px); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ---------- TABLET — 1024px and below ---------- */
@media (max-width: 1024px) {
    .hero-section {
        padding: 6rem 1.5rem;
        min-height: 60vh;
    }

    .page-section {
        padding: 6rem 1.5rem;
    }

    .full-width-section,
    .registration-section,
    .batch-section {
        padding: 5rem 1.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

/* ---------- MOBILE — 768px and below ---------- */
@media (max-width: 768px) {
    /* NAV — hide inline links, keep logo + CTA */
    .nav-bar {
        padding: 0.75rem 1rem;
        height: auto;
        gap: 0.5rem;
    }
    .nav-links { display: none; }
    .nav-logo { height: 32px; }
    .nav-cta {
        padding: 8px 16px;
        font-size: 0.78rem;
    }

    /* HERO */
    .hero-section {
        padding: 6rem 1rem 4rem !important;
        min-height: auto;
    }
    .hero-inner { padding: 0 0.5rem; }
    .landing-badge { font-size: 0.72rem; padding: 5px 14px; }
    .landing-cta-btn,
    .hero-secondary-btn {
        padding: 12px 24px;
        font-size: 0.9rem;
        width: 100%;
        justify-content: center;
    }

    /* SECTION SPACING */
    .page-section,
    .full-width-section,
    .registration-section,
    .batch-section {
        padding: 3rem 1rem;
    }

    /* TYPOGRAPHY */
    .section-title {
        font-size: clamp(1.6rem, 6vw, 2.2rem);
        line-height: 1.25;
    }
    .section-description { font-size: 0.95rem; }

    /* ABOUT */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .about-image-col { margin-bottom: 1rem; }
    .about-avatar-frame { width: 220px; height: 220px; }
    .about-stats {
         gap: 0.5rem;
         justify-content: center;
         width: 100%;
         max-width: 100%;
    }
    .stat-chip {
         flex: 1 1 calc(33.333% - 0.5rem);
         min-width: 0;
         padding: 10px 8px;
     }
    .stat-chip-number { font-size: 1.3rem; }

    /* CLIENTS marquee */
    .clients-section { padding: 1.75rem 1rem; }
    .client-logo {
        height: 48px;
        margin-right: 2rem;
        padding: 0.5rem 0.75rem;
    }

    /* WHY-US CARDS */
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .feature-card { padding: 1.25rem; }

    /* COURSE */
    .topics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    .topic-chip { padding: 0.75rem; font-size: 0.8rem; }
    .goal-box { padding: 1.25rem; margin-top: 1.5rem; }

    /* BATCH */
    .batch-grid { grid-template-columns: 1fr; }
    .batch-card { padding: 1.5rem; margin-top: 2rem; }
    .batch-name-tag { font-size: 1.5rem; margin-bottom: 1.25rem; }

    /* REGISTRATION */
    .reg-form-card { padding: 1.5rem; }
    .reg-form-title { font-size: 1.3rem; }
    .den-submit-btn { height: 48px; font-size: 0.95rem; }

    /* SHOWCASE iframe — JS auto-resizes, this is just a sane minimum */
    .showcase-iframe { min-height: 400px; }
}

/* ---------- SMALL PHONES — 480px and below ---------- */
@media (max-width: 480px) {
    .topics-grid { grid-template-columns: 1fr; }
    .about-stats { flex-direction: column; }
    .stat-chip { width: 100%; }
    .section-title { font-size: 1.5rem; }
    .hero-section { padding: 3rem 0.75rem; }
    .batch-card { padding: 1.25rem; }
    .reg-form-card { padding: 1.25rem; }
}

/* ---------- LANDSCAPE PHONES — short heights (your rotation case!) ---------- */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        padding: 4rem 1rem 2rem;
        min-height: auto;
    }
    .page-section,
    .full-width-section,
    .registration-section,
    .batch-section {
        padding: 2rem 1.5rem;
    }
    .about-avatar-frame { width: 160px; height: 160px; }
    .nav-bar { padding: 0.5rem 1rem; }
}

/* ---------- TOUCH DEVICES — disable lingering hover states ---------- */
@media (hover: none) {
    .topic-chip:hover {
        background: var(--den-bg-card);
        border-color: var(--den-border);
        color: var(--den-text-secondary);
    }
    .feature-card:hover {
        transform: none;
        background: var(--den-bg-card);
        border-color: var(--den-border);
        box-shadow: none;
    }
    .feature-card:hover::before { opacity: 0; }
    .nav-link-btn:hover { color: var(--den-text-secondary); }
    .nav-link-btn:hover::after { width: 0; }
    .landing-cta-btn:hover,
    .nav-cta:hover,
    .den-submit-btn:hover {
        transform: none;
    }
}