@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;600;700;800&family=Roboto:wght@300;400;500&display=swap");

:root {
    --color-primary-blue-dark: #003451;
    --color-primary-blue-light: #008ac1;
    --color-primary-green-dark: #006532;
    --color-primary-green-light: #56bf35;
    --color-primary-yellow: #cee210;
    --color-neutral-white: #ffffff;
    --color-neutral-light: #f5f9fb;
    --color-neutral-mid: #a7b3bc;
    --color-neutral-dark: #4a4f55;
    --color-neutral-black: #000000;
    --color-success: #56bf35;
    --color-warning: #cee210;
    --color-error: #d9534f;

    --font-family-primary: "Montserrat", system-ui, sans-serif;
    --font-family-secondary: "Roboto", system-ui, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    --font-size-hero: 56px;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    --space-section: 100px;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 999px;

    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.12);

    --max-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-md);
    color: var(--color-neutral-dark);
    background: var(--color-neutral-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ── TYPOGRAPHY ── */
h1,
h2,
h3,
h4 {
    color: var(--color-primary-blue-dark);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
}
h1 {
    font-size: var(--font-size-hero);
    font-weight: var(--font-weight-extrabold);
}
h2 {
    font-size: var(--font-size-xxl);
}
h3 {
    font-size: var(--font-size-xl);
    color: var(--color-primary-green-dark);
}
h4 {
    font-size: 20px;
}
p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
}
a {
    color: var(--color-primary-blue-light);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* ── LAYOUT ── */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 80px;
}
.section {
    padding: var(--space-section) 0;
}
.section--alt {
    background: var(--color-neutral-light);
}
.section__header {
    text-align: center;
    margin-bottom: 56px;
}
.section__header h2 {
    margin-bottom: 16px;
}
.section__header p {
    font-size: var(--font-size-lg);
    color: var(--color-neutral-mid);
    max-width: 600px;
    margin: 0 auto;
}
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* ── BUTTONS ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    text-decoration: none;
}
.btn--primary {
    background: var(--color-primary-blue-light);
    color: #fff;
    box-shadow: var(--shadow-light);
}
.btn--primary:hover {
    background: var(--color-primary-blue-dark);
    text-decoration: none;
    color: #fff;
}
.btn--secondary {
    background: transparent;
    color: var(--color-primary-blue-light);
    border-color: var(--color-primary-blue-light);
}
.btn--secondary:hover {
    background: rgba(0, 138, 193, 0.08);
    text-decoration: none;
}
.btn--white {
    background: #fff;
    color: var(--color-primary-blue-dark);
}
.btn--white:hover {
    background: var(--color-neutral-light);
    text-decoration: none;
}

/* ── CARDS ── */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    padding: var(--space-xl);
    transition:
        box-shadow 0.2s ease,
        transform 0.2s ease;
}
.card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-2px);
}
.card__icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    color: var(--color-primary-green-dark);
}
.card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-blue-dark);
    margin-bottom: var(--space-sm);
}
.card__subtitle {
    font-size: var(--font-size-md);
    color: var(--color-primary-green-dark);
    margin-bottom: var(--space-md);
}
.card--tech {
    border-left: 4px solid var(--color-primary-green-dark);
}
.card--institution {
    border-left: 4px solid var(--color-primary-blue-dark);
}
.card--data {
    border-left: 4px solid var(--color-primary-yellow);
}
.card--yellow-accent {
    border-top: 4px solid var(--color-primary-yellow);
}

/* ── HEADER ── */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(0, 52, 81, 0.08);
    height: var(--header-height);
}
.header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.header__logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.header__logo-img {
    height: auto;
    max-height: 62px;
    width: 100%;
    max-width: 124px;
    object-fit: contain;
    display: block;
}
.home__logo-img {
    height: auto;
    max-height: 260px;
    width: 100%;
    object-fit: contain;
    display: block;
    margin: auto auto;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 20px;
}
.header__nav a {
    font-size: 13px;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-blue-dark);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
    padding-bottom: 2px;
}
.header__nav a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-blue-light);
    transition: width 0.2s ease;
}
.header__nav a:hover {
    color: var(--color-primary-blue-light);
}
.header__nav a:hover::after,
.header__nav a.active::after {
    width: 100%;
}
.header__nav a.active {
    color: var(--color-primary-blue-light);
}
.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
    z-index: 10001;
}
.burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary-blue-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}
.burger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.burger.active span:nth-child(2) {
    opacity: 0;
}
.burger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── MOBILE SIDEBAR ── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 52, 81, 0.45);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.sidebar-overlay.visible {
    display: block;
    opacity: 1;
}

/* ── FOOTER ── */
.footer {
    background: var(--color-primary-blue-dark);
    color: #fff;
    padding: 64px 0 32px;
}
.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer__brand {
    font-size: 20px;
    font-weight: var(--font-weight-extrabold);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer__brand img {
    height: 62px;
    width: auto;
    display: block;
    filter: brightness(0) invert(1);
}
.footer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}
.footer h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 16px;
}
.footer__links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer__links a {
    color: var(--color-primary-yellow);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color 0.2s;
}
.footer__links a:hover {
    color: #fff;
}
.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer__bottom p {
    margin: 0;
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.4);
}

/* ── FORMS ── */
.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--space-md);
}
.form-field label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-neutral-dark);
}
.input,
textarea,
select {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--color-neutral-mid);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-md);
    color: var(--color-primary-blue-dark);
    background: #fff;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
    width: 100%;
}
.input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary-blue-light);
    box-shadow: 0 0 0 3px rgba(0, 138, 193, 0.12);
}
textarea {
    resize: vertical;
    min-height: 120px;
}
.input::placeholder,
textarea::placeholder {
    color: var(--color-neutral-mid);
}

/* ── BADGE ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.badge--green {
    background: rgba(86, 191, 53, 0.12);
    color: var(--color-primary-green-dark);
}
.badge--blue {
    background: rgba(0, 138, 193, 0.12);
    color: var(--color-primary-blue-light);
}
.badge--yellow {
    background: rgba(206, 226, 16, 0.18);
    color: #8a9700;
}

/* ── TAG PILL ── */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: var(--color-neutral-light);
    font-size: var(--font-size-xs);
    color: var(--color-neutral-dark);
    font-weight: var(--font-weight-semibold);
}

/* ── DIVIDER ── */
.divider {
    border: none;
    border-top: 1px solid rgba(0, 52, 81, 0.08);
    margin: var(--space-xl) 0;
}

/* ── STAT BLOCK ── */
.stat {
    text-align: center;
    padding: var(--space-xl);
}
.stat__number {
    font-size: 40px;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-primary-blue-dark);
    line-height: 1;
    margin-bottom: 8px;
}
.stat__label {
    font-size: var(--font-size-sm);
    color: var(--color-neutral-mid);
}

/* ── PAGE HERO ── */
.page-hero {
    background: var(--color-primary-blue-dark);
    padding: 72px 0;
    color: #fff;
}
.page-hero h1 {
    color: #fff;
    font-size: 48px;
    margin-bottom: 16px;
}
.page-hero p {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--font-size-lg);
    max-width: 640px;
    margin: 0;
}

/* ── ICON SVG ── */
.icon {
    display: block;
}

/* ── LIST ── */
.check-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: var(--font-size-md);
    color: var(--color-neutral-dark);
}
.check-list li::before {
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    min-width: 20px;
    background: var(--color-primary-green-light);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 00-1.414 0L8 12.586 4.707 9.293a1 1 0 00-1.414 1.414l4 4a1 1 0 001.414 0l8-8a1 1 0 000-1.414z'/%3E%3C/svg%3E");
    background-size: 12px;
    background-repeat: no-repeat;
    background-position: center;
    margin-top: 2px;
}

/* ── ANIMATION ── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.fade-up {
    animation: fadeUp 0.6s ease both;
}
.fade-up--delay-1 {
    animation-delay: 0.1s;
}
.fade-up--delay-2 {
    animation-delay: 0.2s;
}
.fade-up--delay-3 {
    animation-delay: 0.3s;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
    .container {
        padding: 0 40px;
    }
    .header__inner {
        padding: 0 40px;
    }
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    :root {
        --font-size-hero: 36px;
        --font-size-xxl: 26px;
        --font-size-xl: 20px;
        --space-section: 64px;
    }
    .container {
        padding: 0 20px;
    }
    .header {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    .header__inner {
        padding: 0 20px;
    }
    .header__nav {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        max-width: 80vw;
        background: var(--color-neutral-white);
        padding: 0;
        gap: 0;
        z-index: 10000;
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
    }
    .header__nav.open {
        transform: translateX(0);
    }

    .header__nav::before {
        content: "";
        display: block;
        padding: 28px 28px 20px;
        border-bottom: 1px solid rgba(0, 52, 81, 0.08);
        font-size: 20px;
        font-weight: var(--font-weight-extrabold);
        color: var(--color-primary-blue-dark);
    }

    .header__nav a {
        display: flex;
        align-items: center;
        padding: 14px 28px;
        font-size: var(--font-size-md);
        font-weight: var(--font-weight-semibold);
        color: var(--color-primary-blue-dark);
        border-left: 3px solid transparent;
        transition: all 0.2s ease;
    }
    .header__nav a::after {
        display: none;
    }
    .header__nav a:hover,
    .header__nav a:focus {
        background: var(--color-neutral-light);
        color: var(--color-primary-blue-light);
        border-left-color: var(--color-primary-blue-light);
    }
    .header__nav a.active {
        background: var(--color-neutral-light);
        color: var(--color-primary-blue-light);
        border-left-color: var(--color-primary-blue-light);
    }

    .header__nav .btn--secondary {
        margin: 16px 24px 0;
        padding: 12px 18px !important;
        font-size: var(--font-size-sm) !important;
        text-align: center;
        justify-content: center;
        border-left: none;
        border-radius: var(--radius-md);
    }
    .header__nav .btn--secondary:hover {
        border-left: none;
    }

    .burger {
        display: flex;
    }
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer__bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}