/* ========================================
   Synvexa Landing Page - Style
   ======================================== */

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

:root {
    --blue: #0B3D91;
    --blue-light: #1a5fc7;
    --green: #4CAF50;
    --green-light: #66BB6A;
    --orange: #FF9800;
    --orange-light: #FFB74D;

    --bg-dark: #0a0f1a;
    --bg-card: #111827;
    --bg-card-hover: #1a2332;
    --bg-alt: #0d1322;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --gradient: linear-gradient(135deg, var(--blue), var(--green), var(--orange));
    --gradient-text: linear-gradient(135deg, var(--blue-light), var(--green), var(--orange));

    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);

    --header-height: 80px;
    --container-max: 1200px;

    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background: var(--gradient);
    color: #fff;
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(11, 61, 145, 0.4);
}

.btn--outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-hover);
}

.btn--outline:hover {
    border-color: var(--green);
    color: var(--green);
    transform: translateY(-2px);
}

.btn--sm {
    padding: 8px 20px;
    font-size: 0.875rem;
}

.btn--lg {
    padding: 14px 32px;
    font-size: 1rem;
}

.btn--full {
    width: 100%;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* --- Gradient Text --- */
.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Section base --- */
.section {
    padding: 100px 0;
}

.section--alt {
    background: var(--bg-alt);
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition);
}

.header--scrolled {
    background: rgba(10, 15, 26, 0.95);
    box-shadow: var(--shadow);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.header__logo img {
    height: 52px;
    width: auto;
}

.header__nav {
    display: flex;
    gap: 32px;
}

.header__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
}

.header__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width var(--transition);
}

.header__link:hover,
.header__link.active {
    color: var(--text-primary);
}

.header__link:hover::after,
.header__link.active::after {
    width: 100%;
}

.header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language Switch */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.lang-switch:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.lang-switch__current {
    color: var(--green);
}

.lang-switch__separator {
    opacity: 0.3;
}

/* Hamburger */
.header__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.header__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition);
}

.header__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.header__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(11, 61, 145, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(76, 175, 80, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 80%, rgba(255, 152, 0, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.hero__inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 60px 24px;
}

.hero__title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- About --- */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about__content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.about__content strong {
    color: var(--text-primary);
}

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

.about__card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}

.about__card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.about__icon {
    width: 28px;
    height: 28px;
    color: var(--green);
    margin-bottom: 12px;
}

.about__card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.about__card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.services__card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.services__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity var(--transition);
}

.services__card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.services__card:hover::before {
    opacity: 1;
}

.services__icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    background: rgba(76, 175, 80, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.services__icon-wrap svg {
    width: 24px;
    height: 24px;
    color: var(--green);
}

.services__card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.services__card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Why Us --- */
.why-us__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.why-us__item {
    text-align: center;
    padding: 32px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.why-us__item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.why-us__number {
    font-size: 3rem;
    font-weight: 800;
    display: inline;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.why-us__suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.why-us__item p {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.why-us__feature {
    display: flex;
    gap: 16px;
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.why-us__feature:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.why-us__feature svg {
    width: 24px;
    height: 24px;
    color: var(--orange);
    flex-shrink: 0;
    margin-top: 2px;
}

.why-us__feature h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.why-us__feature p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Contact --- */
.contact__wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    max-width: 900px;
    margin: 0 auto;
}

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

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form__group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form__group input,
.form__group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all var(--transition);
    outline: none;
}

.form__group input:focus,
.form__group textarea:focus {
    border-color: var(--blue-light);
    box-shadow: 0 0 0 3px rgba(11, 61, 145, 0.2);
}

.form__group input::placeholder,
.form__group textarea::placeholder {
    color: var(--text-muted);
}

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

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding-top: 20px;
}

.contact__info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact__info-item svg {
    width: 22px;
    height: 22px;
    color: var(--green);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact__info-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact__info-item p,
.contact__info-item a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact__info-item a:hover {
    color: var(--green);
}

/* Form success message */
.form__success {
    display: none;
    text-align: center;
    padding: 40px;
}

.form__success.show {
    display: block;
}

.form__success svg {
    width: 48px;
    height: 48px;
    color: var(--green);
    margin: 0 auto 16px;
}

.form__success h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.form__success p {
    color: var(--text-secondary);
}

/* --- Footer --- */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
}

.footer__inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer__logo {
    height: 32px;
    width: auto;
    margin-bottom: 12px;
}

.footer__brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer__links h4,
.footer__social h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.footer__links a {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    padding: 4px 0;
}

.footer__links a:hover {
    color: var(--text-primary);
}

.footer__social-links {
    display: flex;
    gap: 12px;
}

.footer__social-links a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.footer__social-links a:hover {
    border-color: var(--green);
    background: rgba(76, 175, 80, 0.1);
}

.footer__social-links svg {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
}

.footer__social-links a:hover svg {
    color: var(--green);
}

.footer__bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

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

    .why-us__features {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .section {
        padding: 72px 0;
    }

    .header__nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 15, 26, 0.98);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 32px;
        z-index: 999;
    }

    .header__nav.open {
        display: flex;
    }

    .header__nav .header__link {
        font-size: 1.25rem;
    }

    .header__actions .btn {
        display: none;
    }

    .header__hamburger {
        display: flex;
    }

    .about__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

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

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

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

    .hero__title {
        font-size: clamp(2rem, 7vw, 3rem);
    }
}

@media (max-width: 480px) {
    .why-us__grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .why-us__number {
        font-size: 2.25rem;
    }

    .hero__actions {
        flex-direction: column;
        align-items: center;
    }

    .hero__actions .btn {
        width: 100%;
        max-width: 280px;
    }
}