/* ==========================================================================
                                GOOGLE FONTS
========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

@font-face {
    font-family: "General Sans";
    src: url("../fonts/GeneralSans-Regular.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "General Sans";
    src: url("../fonts/GeneralSans-Medium.woff2") format("woff2");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "General Sans";
    src: url("../fonts/GeneralSans-Semibold.woff2") format("woff2");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "General Sans";
    src: url("../fonts/GeneralSans-Bold.woff2") format("woff2");
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ==========================================================================
                                  CSS RESET
========================================================================== */

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

html {
    scroll-behavior: auto;
    scroll-padding-top: 7rem;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
    background-color: var(--clr-bg-100);
    color: var(--clr-text-primary);
    font-family: var(--ff-body);
    font-size: var(--fs-200);
    font-weight: var(--fw-regular);
    line-height: 1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -2;
}

body::before {
    background:
        radial-gradient(circle at 15% 15%, rgba(0, 209, 164, 0.12), transparent 28%),
        radial-gradient(circle at 85% 10%, rgba(255, 255, 255, 0.03), transparent 25%),
        radial-gradient(circle at 50% 100%, rgba(0, 209, 164, 0.06), transparent 40%);
}

body::after {
    z-index: -1;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.01), transparent 20%, transparent 80%, rgba(255, 255, 255, 0.02));
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

button, input, textarea, select {
    font: inherit;
    border: 0;
    outline: 0;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
}

a:hover {
    color: var(--clr-brand-500);
}

a:focus-visible {
    outline: 2px solid var(--clr-brand-500);
    outline-offset: 4px;
}

ul, ol {
    list-style: none;
}

/* ==========================================================================
                                DESIGN TOKENS
========================================================================== */

:root {
    --clr-brand-100: #a6fff0;
    --clr-brand-200: #63ffe0;
    --clr-brand-300: #1bffc9;
    --clr-brand-400: #00e0ae;
    --clr-brand-500: #00d1a4;
    --clr-brand-600: #00b98f;
    --clr-brand-700: #009a77;

    --clr-bg-100: #090909;
    --clr-bg-200: #0d0d0f;
    --clr-bg-300: #111214;
    --clr-bg-400: #17191d;

    --clr-surface-100: #1a1c20;
    --clr-surface-200: #20242a;
    --clr-surface-300: #272c33;

    --clr-white: #fafafa;
    --clr-text-primary: #f5f7fa;
    --clr-text-secondary: #c3c7ce;
    --clr-text-muted: #9096a1;

    --border-light: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.15);
    --border-strong: rgba(255, 255, 255, 0.25);

    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 16px;

    --shadow-sm: 0 8px 30px rgba(0, 0, 0, 0.18);
    --shadow-md: 0 15px 45px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 45px rgba(0, 209, 164, 0.2);

    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 999px;
    --radius-card: 24px;

    --transition-fast: 0.18s ease;
    --transition-normal: 0.28s ease;
    --transition-slow: 0.5s ease;

    --container-width: 1320px;
    --section-gap: 5.5rem;
    --content-gap: 2rem;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;
    --space-9: 5rem;
    --space-10: 6rem;

    --ff-heading: "General Sans", sans-serif;
    --ff-body: "Inter", sans-serif;

    --fs-100: 0.875rem;
    --fs-200: 1rem;
    --fs-300: 1.125rem;
    --fs-400: 1.5rem;
    --fs-500: 2rem;
    --fs-600: 3rem;
    --fs-700: 4rem;
    --fs-800: 5rem;

    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-black: 900;

    --z-header: 700;
    --z-default: 1;
}

/* ==========================================================================
                            TYPOGRAPHY SYSTEM
========================================================================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--clr-white);
    font-family: var(--ff-heading);
    font-weight: var(--fw-bold);
    letter-spacing: -0.04em;
    line-height: 1.1;
}

h1 { font-size: clamp(3.4rem, 8vw, 6rem); }
h2 { font-size: clamp(2.2rem, 4.5vw, 3.2rem); }
h3 { font-size: clamp(1.35rem, 2.5vw, 1.8rem); }

p {
    color: var(--clr-text-secondary);
    max-width: 65ch;
}

strong { color: var(--clr-white); font-weight: var(--fw-semibold); }
small { color: var(--clr-text-muted); }

/* ==========================================================================
                            ACCESSIBILITY
========================================================================== */

.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99999;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-full);
    background: var(--clr-brand-500);
    color: #000;
}

.skip-link:focus {
    top: 1.5rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
                            LAYOUT & UTILITIES
========================================================================== */

.container {
    width: min(92%, var(--container-width));
    margin-inline: auto;
}

.section {
    padding-block: var(--section-gap);
}

.section-header {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 4rem;
}

.section-header__eyebrow {
    display: inline-flex;
    align-items: center;
    width: max-content;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-full);
    background: rgba(0, 209, 164, 0.08);
    color: var(--clr-brand-400);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.section-header__title {
    max-width: 14ch;
}

.section-header__description {
    max-width: 60ch;
}

/* ==========================================================================
                            BUTTONS
========================================================================== */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem;
    padding: 0.85rem 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        border-color 0.45s ease,
        background 0.45s ease,
        color 0.45s ease,
        box-shadow 0.45s ease;
}

.button:hover {
    transform: translate3d(0, -3px, 0);
}

.button:active {
    transform: translate3d(0, -1px, 0) scale(0.98);
    transition-duration: 0.12s;
}

.button--primary {
    background: linear-gradient(135deg, var(--clr-brand-500), var(--clr-brand-400));
    color: #04120f;
    box-shadow: 0 15px 40px rgba(0, 209, 164, 0.2);
}

.button--primary:hover {
    color: #04120f;
    box-shadow: 0 18px 44px rgba(0, 209, 164, 0.28);
}

.button--secondary {
    border-color: var(--border-light);
    background: rgba(255, 255, 255, 0.03);
    color: var(--clr-text-primary);
}

.button--secondary:hover {
    border-color: rgba(0, 209, 164, 0.22);
    background: rgba(0, 209, 164, 0.05);
}

/* ==========================================================================
                            CARD SYSTEM
========================================================================== */

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: rgba(13, 13, 15, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-card);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
}

.card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 209, 164, 0.25);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35);
}

.card__media {
    position: relative;
    overflow: hidden;
}

.card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.75s ease, filter 0.75s ease;
}

.card:hover .card__media img {
    transform: scale(1.08);
    filter: brightness(1.08);
}

.card__content {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 1.25rem;
    padding: 2rem;
}

.card__badge {
    display: inline-flex;
    align-self: flex-start;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-full);
    background: rgba(0, 209, 164, 0.1);
    color: var(--clr-brand-500);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.card__title {
    color: var(--clr-white);
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.25;
}

.card__description {
    color: var(--clr-text-secondary);
    line-height: 1.8;
}

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

.card__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--clr-brand-500);
    font-weight: 600;
    margin-top: auto;
}

.card__link:hover {
    gap: 0.9rem;
}

/* ==========================================================================
                            HEADER & NAVIGATION
========================================================================== */

.header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: var(--z-header);
    background: transparent;
    transition: transform var(--transition-normal), background var(--transition-normal), backdrop-filter var(--transition-normal), border-color var(--transition-normal);
}

.header.header--hidden {
    transform: translateY(-100%);
}

.header.scrolled {
    background: rgba(12, 12, 14, 0.72);
    backdrop-filter: blur(22px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: 5.5rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    font-family: var(--ff-heading);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.navbar__list,
.header__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar__list {
    gap: 2rem;
}

.navbar__link {
    position: relative;
    color: var(--clr-text-secondary);
    font-weight: 500;
}

.navbar__link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.5rem;
    width: 100%;
    height: 2px;
    border-radius: var(--radius-full);
    background: var(--clr-brand-500);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.navbar__link:hover::after,
.navbar__link--active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.navbar__link--active {
    color: var(--clr-white);
}

.menu-button {
    display: none;
    color: var(--clr-white);
    font-size: 1.3rem;
}

.mobile-navigation {
    position: fixed;
    inset: 0;
    z-index: 600;
    background: rgba(9, 9, 9, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-20px);
    transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal);
}

.mobile-navigation.navigation--open {
    display: flex;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.mobile-navigation__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.mobile-navigation__list a {
    font-family: var(--ff-heading);
    font-size: var(--fs-400);
    font-weight: var(--fw-semibold);
    color: var(--clr-text-secondary);
    transition: color var(--transition-fast);
}

.mobile-navigation__list a:hover,
.mobile-navigation__list a.navbar__link--active {
    color: var(--clr-brand-500);
}

.body--locked {
    overflow: hidden;
}

/* ==========================================================================
                            FOOTER
========================================================================== */

.footer {
    position: relative;
    padding: 5rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.footer__top {
    display: flex;
    justify-content: space-between;
    gap: 3rem;
}

.footer__brand {
    max-width: 28rem;
}

.footer__logo {
    display: inline-block;
    margin-bottom: 1rem;
    font-family: var(--ff-heading);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.footer__description {
    color: var(--clr-text-secondary);
    line-height: 1.8;
}

.footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.footer__column {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer__heading {
    color: var(--clr-white);
    font-size: 1rem;
    font-weight: 600;
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer__link {
    color: var(--clr-text-secondary);
    position: relative;
}

.footer__link:hover {
    color: var(--clr-brand-500);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer__legal {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

#back-to-top {
    position: fixed;
    right: 2rem;
    bottom: 2rem;
    width: 3.25rem;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(18px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal), transform var(--transition-normal), background var(--transition-normal);
}

#back-to-top.show {
    opacity: 1;
    visibility: visible;
}

#back-to-top:hover {
    transform: translateY(-4px);
    background: var(--clr-brand-500);
    color: #000;
}

/* ==========================================================================
                            GLOBAL ANIMATIONS
========================================================================== */

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

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

@media (max-width: 992px) {
    .navbar {
        display: none;
    }

    .menu-button {
        display: inline-flex;
    }

    .header__actions .button--secondary {
        display: none;
    }

    .footer__top {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .header__container {
        min-height: 4.75rem;
    }

    .button {
        width: 100%;
    }

    .footer__bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}