/* ============================================================
   P2VAK Engine Decarbonisation Camp — Design System & Styles
   Color palette derived from the P2VAK logo:
   Slate-blue → Teal/Cyan gradient
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    /* Brand Colors — matched to P2VAK logo */
    --navy-900: #0A1628;
    --navy-800: #0F2035;
    --navy-700: #1A3550;
    --navy-600: #25496A;
    --teal-600: #4D9199;
    --teal-500: #6BAFB5;
    --teal-400: #8CC8CE;
    --teal-300: #A8D8DC;
    --teal-200: #C5E8EB;
    --slate-600: #4F6D7A;
    --slate-500: #6B8FA0;
    --gold-500: #FFB300;
    --gold-400: #FFCA28;
    --white: #FFFFFF;
    --white-10: rgba(255,255,255,0.1);
    --white-15: rgba(255,255,255,0.15);
    --white-20: rgba(255,255,255,0.2);
    --white-50: rgba(255,255,255,0.5);
    --white-70: rgba(255,255,255,0.7);
    --white-85: rgba(255,255,255,0.85);
    --black-10: rgba(0,0,0,0.1);
    --black-20: rgba(0,0,0,0.2);
    --red-500: #ef4444;

    /* Accent shortcuts (for easy reference) */
    --accent: var(--teal-500);
    --accent-dark: var(--teal-600);
    --accent-light: var(--teal-400);
    --accent-glow: rgba(107, 175, 181, 0.35);
    --accent-subtle: rgba(107, 175, 181, 0.15);

    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --section-padding: 5rem 2rem;
    --card-radius: 16px;
    --btn-radius: 10px;

    /* Glass */
    --glass-bg: rgba(255,255,255,0.08);
    --glass-border: rgba(255,255,255,0.12);
    --glass-blur: 16px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--navy-900);
    color: var(--white);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- Utility ---------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--white-70);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.accent-text { color: var(--teal-400); }
.gold-text { color: var(--gold-400); }

/* Fade-in animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.stagger-children .fade-in:nth-child(1) { transition-delay: 0s; }
.stagger-children .fade-in:nth-child(2) { transition-delay: 0.1s; }
.stagger-children .fade-in:nth-child(3) { transition-delay: 0.15s; }
.stagger-children .fade-in:nth-child(4) { transition-delay: 0.2s; }
.stagger-children .fade-in:nth-child(5) { transition-delay: 0.25s; }
.stagger-children .fade-in:nth-child(6) { transition-delay: 0.3s; }
.stagger-children .fade-in:nth-child(7) { transition-delay: 0.35s; }

/* ============================================================
   NAVIGATION
   ============================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
}

.navbar.scrolled {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 20px var(--black-20);
    padding: 0.6rem 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

/* Actual logo image in navbar */
.nav-logo {
    height: 44px;
    width: auto;
    object-fit: contain;
    transition: height 0.3s;
}

.navbar.scrolled .nav-logo {
    height: 36px;
}

/* Large logo (hero, footer, sponsor) */
.logo-large {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.logo-medium {
    height: 48px;
    width: auto;
    object-fit: contain;
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--white-70);
    transition: color 0.25s;
    position: relative;
}

.nav-links a:hover { color: var(--white); }

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--teal-400);
    transition: width 0.3s var(--ease-out);
}

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

.nav-cta {
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600)) !important;
    color: var(--white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--btn-radius);
    font-weight: 600 !important;
    transition: transform 0.25s, box-shadow 0.25s !important;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.35);
}

.nav-cta::after { display: none !important; }

/* Mobile hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 5rem;
    overflow: hidden;
}

/* Animated gradient background */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(107,175,181,0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(26,53,80,0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(107,175,181,0.06) 0%, transparent 50%),
        linear-gradient(180deg, var(--navy-800) 0%, var(--navy-900) 100%);
    z-index: 0;
}

/* Floating particles */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    animation: float-particles 20s linear infinite;
}

@keyframes float-particles {
    0% { transform: translateY(0); }
    100% { transform: translateY(-60px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: var(--teal-400);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--teal-400);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.4); }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero h1 .free-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--teal-400), var(--teal-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--white-70);
    margin-bottom: 2.5rem;
    line-height: 1.5;
}

.hero-tagline span {
    color: var(--white);
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: var(--btn-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
    font-family: inherit;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 8px 30px rgba(76, 175, 80, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 1.5px solid var(--white-20);
}

.btn-outline:hover {
    border-color: var(--white-50);
    background: var(--white-10);
}

/* Hero stats */
.hero-stats {
    display: flex;
    gap: 3rem;
    justify-content: center;
    margin-top: 4rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--white-10);
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--teal-400);
}

.hero-stat-label {
    font-size: 0.85rem;
    color: var(--white-50);
    margin-top: 0.25rem;
}

/* ============================================================
   SPONSORS BAR
   ============================================================ */
.sponsors {
    padding: 2.5rem 0;
    background: var(--white-10);
    border-top: 1px solid var(--white-10);
    border-bottom: 1px solid var(--white-10);
}

.sponsors .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.sponsor-badge {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    color: var(--white-70);
}

.sponsor-icon {
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.sponsor-badge strong {
    color: var(--white);
    font-weight: 600;
}

.sponsor-divider {
    width: 1px;
    height: 40px;
    background: var(--white-15);
}

/* ============================================================
   HHO TECHNOLOGY SECTION
   ============================================================ */
.hho-section {
    padding: var(--section-padding);
}

.hho-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hho-visual {
    position: relative;
}

.hho-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--card-radius);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.hho-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(107,175,181,0.06) 0%, transparent 70%);
    animation: gentle-pulse 6s ease-in-out infinite;
}

@keyframes gentle-pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 1; }
}

.hho-icon-large {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    position: relative;
}

.before-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.ba-card {
    background: var(--white-10);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--white-10);
    transition: border-color 0.3s;
}

.ba-card:hover { border-color: var(--white-20); }

.ba-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.ba-card.before .ba-label { color: var(--red-500); }
.ba-card.after .ba-label { color: var(--teal-400); }

.ba-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.ba-text {
    font-size: 0.85rem;
    color: var(--white-70);
}

.hho-info h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hho-info p {
    color: var(--white-70);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.hho-badges {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.hho-badge-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--teal-400);
}

/* ============================================================
   BENEFITS SECTION
   ============================================================ */
.benefits-section {
    padding: var(--section-padding);
    background: linear-gradient(180deg, transparent, rgba(107,175,181,0.03), transparent);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
}

.benefit-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--card-radius);
    padding: 1.75rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    transition: transform 0.3s var(--ease-out), border-color 0.3s, box-shadow 0.3s;
}

.benefit-card:hover {
    transform: translateY(-4px);
    border-color: rgba(107,175,181,0.3);
    box-shadow: 0 8px 30px rgba(107,175,181,0.1);
}

.benefit-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(107,175,181,0.15), rgba(107,175,181,0.05));
    border: 1px solid rgba(107,175,181,0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.benefit-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.benefit-content p {
    font-size: 0.85rem;
    color: var(--white-50);
    line-height: 1.5;
}

/* ============================================================
   VEHICLE TYPES SECTION
   ============================================================ */
.vehicles-section {
    padding: var(--section-padding);
}

.vehicles-grid {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.vehicle-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--card-radius);
    padding: 2rem 2.5rem;
    text-align: center;
    min-width: 160px;
    transition: transform 0.3s var(--ease-out), border-color 0.3s, background 0.3s;
    cursor: default;
}

.vehicle-card:hover {
    transform: translateY(-6px);
    border-color: var(--teal-500);
    background: rgba(107,175,181,0.08);
}

.vehicle-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.vehicle-label {
    font-size: 0.9rem;
    font-weight: 600;
}

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
    padding: 4rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--teal-600), var(--navy-700));
    opacity: 0.3;
    border-radius: 0;
}

.cta-inner {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.cta-banner h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.cta-banner p {
    color: var(--white-70);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Pulse animation on CTA */
.pulse-btn {
    animation: btn-pulse 2.5s ease-in-out infinite;
}

@keyframes btn-pulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(107,175,181,0.3); }
    50% { box-shadow: 0 4px 35px rgba(107,175,181,0.6); }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    padding: 3rem 2rem 2rem;
    border-top: 1px solid var(--white-10);
    background: rgba(0,0,0,0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-brand p {
    color: var(--white-50);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    line-height: 1.6;
}

.footer h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    color: var(--white-70);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--white-70);
    margin-bottom: 0.6rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.social-icon {
    width: 38px;
    height: 38px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background 0.25s, border-color 0.25s;
}

.social-icon:hover {
    background: var(--white-15);
    border-color: var(--white-20);
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid var(--white-10);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--white-50);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.eco-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--teal-400);
    font-weight: 600;
    font-size: 0.8rem;
}

/* ============================================================
   REGISTRATION FORM PAGE
   ============================================================ */
.reg-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 3rem;
    position: relative;
}

.reg-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 30%, rgba(107,175,181,0.1) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 70%, rgba(26,53,80,0.2) 0%, transparent 50%),
        linear-gradient(180deg, var(--navy-800) 0%, var(--navy-900) 100%);
    z-index: 0;
}

.form-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 580px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--card-radius);
    padding: 2.5rem;
    box-shadow: 0 8px 40px rgba(0,0,0,0.3);
}

.form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.form-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.form-header p {
    color: var(--white-50);
    font-size: 0.9rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--white-70);
}

.form-group label .required {
    color: var(--red-500);
    margin-left: 2px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.7rem 1rem;
    background: var(--white-10);
    border: 1px solid var(--white-15);
    border-radius: 10px;
    color: var(--white);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
    outline: none;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.5)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-group select option {
    background: var(--navy-800);
    color: var(--white);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--white-50);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--teal-500);
    background: rgba(107,175,181,0.05);
    box-shadow: 0 0 0 3px rgba(107,175,181,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Error state */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: var(--red-500);
    box-shadow: 0 0 0 3px rgba(239,68,68,0.1);
}

.form-group .error-text {
    font-size: 0.78rem;
    color: var(--red-500);
    margin-top: 0.3rem;
}

.submit-btn {
    width: 100%;
    padding: 0.85rem;
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
    color: var(--white);
    border: none;
    border-radius: var(--btn-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
    font-family: inherit;
    margin-top: 0.5rem;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(107,175,181,0.35);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Result message */
#resultMessage {
    text-align: center;
    padding: 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
}

#resultMessage.success {
    background: rgba(107,175,181,0.15);
    border: 1px solid rgba(107,175,181,0.3);
    color: var(--teal-400);
}

#resultMessage.error {
    background: rgba(239,68,68,0.15);
    border: 1px solid rgba(239,68,68,0.3);
    color: var(--red-500);
}

.form-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--white-50);
}

.form-footer a {
    color: var(--teal-400);
    font-weight: 500;
    transition: color 0.2s;
}

.form-footer a:hover { color: var(--teal-500); }

/* Success checkmark animation */
.success-check {
    display: none;
    text-align: center;
    padding: 2rem;
}

.success-check.show { display: block; }

.check-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    animation: pop-in 0.5s var(--ease-out);
}

@keyframes pop-in {
    0% { transform: scale(0); }
    60% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

.success-check h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.success-check p {
    color: var(--white-50);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: rgba(6,14,46,0.98);
        backdrop-filter: blur(12px);
        padding: 1rem 0;
    }

    .nav-links.open { display: flex; }

    .nav-links a {
        padding: 0.75rem 1.5rem;
        width: 100%;
    }

    .nav-links a::after { display: none; }

    .nav-cta {
        margin: 0.5rem 1.5rem;
        text-align: center;
    }

    .nav-toggle { display: flex; }

    .hero { padding: 7rem 1.5rem 3rem; min-height: auto; }

    .hero-stats {
        gap: 1.5rem;
        flex-wrap: wrap;
    }

    .hho-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .vehicles-grid {
        gap: 1rem;
    }

    .vehicle-card {
        min-width: 130px;
        padding: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-card {
        padding: 1.75rem;
    }

    .sponsor-divider { display: none; }

    .sponsors .container {
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2rem; }
    .hero-tagline { font-size: 1rem; }
    .hero-stats { gap: 1rem; }
    .hero-stat-number { font-size: 1.5rem; }
    .vehicles-grid { gap: 0.75rem; }
    .vehicle-card { min-width: 100px; padding: 1.25rem 1rem; }
    .vehicle-icon { font-size: 2rem; }
}