/* ================================================
   NEXTERA AUTOMOTIVE — Corporate Engineer Design
   Colors: Deep Blue #0B3D91, Slate, White
   Fonts: DM Sans + Instrument Serif
   ================================================ */

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

:root {
    /* Primary palette */
    --blue-900: #06214f;
    --blue-800: #0B3D91;
    --blue-700: #0e4fba;
    --blue-600: #1a6bdb;
    --blue-100: #dbe8fd;
    --blue-50:  #eef4ff;

    /* Neutrals */
    --gray-950: #0a0f1a;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50:  #f9fafb;
    --white:    #ffffff;

    /* Accents */
    --accent-green: #059669;
    --accent-amber: #d97706;
    --accent-red:   #dc2626;

    /* Semantic */
    --bg-primary:   var(--white);
    --bg-secondary: var(--gray-50);
    --bg-tertiary:  var(--blue-50);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted:   var(--gray-400);
    --border-color: var(--gray-200);

    /* Typography */
    --font-body:    'DM Sans', system-ui, -apple-system, sans-serif;
    --font-display: 'Instrument Serif', Georgia, serif;

    /* Spacing */
    --section-py: 100px;
    --container-px: 24px;
    --container-max: 1200px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration: 0.4s;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- CONTAINER ---------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-px);
}

/* ---------- NAVIGATION ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--duration) var(--ease-out),
                background var(--duration) var(--ease-out);
}

.nav--scrolled {
    border-bottom-color: var(--border-color);
    background: rgba(255, 255, 255, 0.95);
}

.nav__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.nav__logo-icon { flex-shrink: 0; }

.nav__logo-name {
    font-weight: 700;
    font-size: 18px;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.nav__logo-sub {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--gray-500);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: -2px;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav__link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
    transition: color 0.2s, background 0.2s;
}

.nav__link:hover {
    color: var(--blue-800);
    background: var(--blue-50);
}

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

.nav__user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav__user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}

.nav__logout-form { display: inline; }

.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav__burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ---------- BUTTONS ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    border-radius: var(--radius-sm);
    transition: all 0.25s var(--ease-out);
    white-space: nowrap;
    line-height: 1;
}

.btn i, .btn svg { width: 16px; height: 16px; }

.btn--sm { padding: 8px 16px; font-size: 13px; }
.btn--lg { padding: 14px 28px; font-size: 15px; }
.btn--full { width: 100%; }

.btn--primary {
    background: var(--blue-800);
    color: var(--white);
    box-shadow: 0 1px 3px rgba(11, 61, 145, 0.3);
}

.btn--primary:hover {
    background: var(--blue-700);
    box-shadow: 0 4px 14px rgba(11, 61, 145, 0.35);
    transform: translateY(-1px);
}

.btn--outline {
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
    background: var(--white);
}

.btn--outline:hover {
    border-color: var(--blue-800);
    color: var(--blue-800);
    background: var(--blue-50);
}

.btn--ghost {
    color: var(--gray-600);
    background: transparent;
}

.btn--ghost:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

/* ---------- HERO ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero__grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(11, 61, 145, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(11, 61, 145, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
}

.hero__gradient {
    position: absolute;
    top: -200px;
    right: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(11, 61, 145, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px 6px 10px;
    background: var(--blue-50);
    border: 1px solid var(--blue-100);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--blue-800);
    margin-bottom: 28px;
    animation: fadeInUp 0.6s var(--ease-out) both;
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--blue-800);
    animation: pulse 2s ease infinite;
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 400;
    line-height: 1.1;
    color: var(--gray-950);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s var(--ease-out) 0.1s both;
}

.hero__title em {
    font-style: italic;
    color: var(--blue-800);
}

.hero__subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray-600);
    max-width: 620px;
    margin-bottom: 36px;
    animation: fadeInUp 0.6s var(--ease-out) 0.2s both;
}

.hero__actions {
    display: flex;
    gap: 14px;
    margin-bottom: 64px;
    animation: fadeInUp 0.6s var(--ease-out) 0.3s both;
}

.hero__stats {
    display: flex;
    align-items: center;
    gap: 40px;
    animation: fadeInUp 0.6s var(--ease-out) 0.4s both;
}

.hero__stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--blue-800);
    letter-spacing: -0.03em;
    line-height: 1;
}

.hero__stat-plus {
    font-size: 24px;
    font-weight: 700;
    color: var(--blue-800);
}

.hero__stat-label {
    display: block;
    font-size: 13px;
    color: var(--gray-500);
    font-weight: 500;
    margin-top: 6px;
}

.hero__stat-divider {
    width: 1px;
    height: 40px;
    background: var(--gray-300);
}

/* ---------- SECTIONS ---------- */
.section {
    padding: var(--section-py) 0;
}

.section:nth-child(even) {
    background: var(--bg-secondary);
}

.section__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section__tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--blue-800);
    background: var(--blue-50);
    padding: 5px 14px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.section__title {
    font-family: var(--font-display);
    font-size: clamp(30px, 4vw, 42px);
    font-weight: 400;
    color: var(--gray-950);
    line-height: 1.15;
    margin-bottom: 16px;
}

.section__desc {
    font-size: 17px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ---------- SERVICES ---------- */
.services__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: all var(--duration) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue-800), var(--blue-600));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration) var(--ease-out);
}

.service-card:hover {
    border-color: var(--blue-100);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-50);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    color: var(--blue-800);
}

.service-card__icon i, .service-card__icon svg {
    width: 24px;
    height: 24px;
}

.service-card__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
    line-height: 1.3;
}

.service-card__text {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
}

.service-card__tags li {
    font-size: 12px;
    font-weight: 500;
    color: var(--blue-800);
    background: var(--blue-50);
    padding: 4px 12px;
    border-radius: 100px;
}

/* ---------- STANDARDS ---------- */
.standards { background: var(--gray-950); }
.standards .section__tag { background: rgba(255,255,255,0.1); color: var(--blue-100); }
.standards .section__title { color: var(--white); }
.standards .section__desc { color: var(--gray-400); }

.standards__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.standard-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--duration) var(--ease-out);
}

.standard-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
}

.standard-card__header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.standard-card__badge {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--blue-100);
    background: rgba(11, 61, 145, 0.4);
    padding: 4px 10px;
    border-radius: 100px;
}

.standard-card__title {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
}

.standard-card__name {
    font-size: 13px;
    font-weight: 500;
    color: var(--blue-100);
    margin-bottom: 14px;
}

.standard-card__text {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.7;
}

/* ---------- ADVANTAGES ---------- */
.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.advantage {
    padding: 8px 0;
}

.advantage__number {
    font-size: 42px;
    font-weight: 700;
    color: var(--blue-100);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    font-family: var(--font-display);
}

.advantage__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.advantage__text {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ---------- FAQ ---------- */
.faq__list {
    max-width: 760px;
    margin: 0 auto;
}

.faq__item {
    border-bottom: 1px solid var(--border-color);
}

.faq__item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    text-align: left;
    transition: color 0.2s;
}

.faq__question:hover { color: var(--blue-800); }

.faq__chevron {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: var(--gray-400);
    transition: transform 0.3s var(--ease-out);
}

.faq__item--open .faq__chevron {
    transform: rotate(180deg);
    color: var(--blue-800);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s var(--ease-out);
}

.faq__answer p {
    padding-bottom: 22px;
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
}

.faq__item--open .faq__answer {
    max-height: 300px;
}

/* ---------- CONTACT ---------- */
.contact { background: var(--bg-secondary); }

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact__text {
    font-size: 17px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 36px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact__detail {
    display: flex;
    align-items: center;
    gap: 14px;
}

.contact__detail i {
    width: 20px;
    height: 20px;
    color: var(--blue-800);
    flex-shrink: 0;
}

.contact__detail strong {
    display: block;
    font-size: 14px;
    color: var(--gray-900);
    font-weight: 600;
}

.contact__detail span {
    font-size: 14px;
    color: var(--gray-500);
}

.contact__form-wrap {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.contact__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ---------- FORMS ---------- */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
}

.form-optional {
    font-weight: 400;
    color: var(--gray-400);
}

.form-input {
    padding: 12px 16px;
    font-size: 14px;
    font-family: var(--font-body);
    color: var(--gray-900);
    background: var(--gray-50);
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    outline: none;
}

.form-input::placeholder { color: var(--gray-400); }

.form-input:focus {
    border-color: var(--blue-800);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(11, 61, 145, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    font-size: 12px;
    color: var(--accent-red);
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-600);
    cursor: pointer;
}

.form-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--blue-800);
}

/* ---------- ALERT ---------- */
.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.alert--success {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
}

.alert--success i { color: #059669; width: 18px; height: 18px; }

/* ---------- AUTH PAGES ---------- */
.auth {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px var(--container-px) 60px;
    background: var(--bg-secondary);
}

.auth__container {
    width: 100%;
    max-width: 440px;
}

.auth__card--wide {
    max-width: 560px;
}

.auth__card--wide .auth__container,
.auth__card--wide { max-width: 560px; }

.auth__card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    box-shadow: var(--shadow-lg);
}

.auth__header {
    text-align: center;
    margin-bottom: 36px;
}

.auth__logo {
    display: inline-block;
    margin-bottom: 20px;
}

.auth__title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 400;
    color: var(--gray-950);
    margin-bottom: 8px;
}

.auth__subtitle {
    font-size: 14px;
    color: var(--gray-500);
}

.auth__form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.auth__errors {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--accent-red);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.auth__errors:empty { display: none; }

.auth__footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--gray-500);
}

.auth__footer a {
    color: var(--blue-800);
    font-weight: 600;
}

.auth__footer a:hover {
    text-decoration: underline;
}

/* ---------- FOOTER ---------- */
.footer {
    background: var(--gray-950);
    padding: 72px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer__desc {
    font-size: 14px;
    color: var(--gray-400);
    line-height: 1.7;
    margin-top: 16px;
    max-width: 280px;
}

.footer__heading {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--gray-300);
    margin-bottom: 16px;
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer__link {
    font-size: 14px;
    color: var(--gray-400);
    transition: color 0.2s;
}

.footer__link:hover { color: var(--white); }

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 13px;
    color: var(--gray-500);
}

/* ---------- ANIMATIONS ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
    .services__grid,
    .standards__grid,
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-py: 72px;
    }

    .nav__links { display: none; }

    .nav__burger { display: flex; }

    .nav__links--open {
        display: flex;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--white);
        border-bottom: 1px solid var(--border-color);
        padding: 16px var(--container-px);
        box-shadow: var(--shadow-lg);
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero__title {
        font-size: 36px;
    }

    .hero__stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .hero__stat-divider { display: none; }

    .hero__actions {
        flex-direction: column;
    }

    .services__grid,
    .standards__grid,
    .advantages__grid {
        grid-template-columns: 1fr;
    }

    .contact__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer__bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .form-row-2 {
        grid-template-columns: 1fr;
    }

    .auth__card {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .hero__title { font-size: 30px; }
    .btn--lg { padding: 12px 24px; }
    .contact__form-wrap { padding: 28px 24px; }
}