/* =========================================
   BLACKSHARK — CSS GLOBAL
   ========================================= */

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

html,
body {
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

body {
    font-family: 'Montserrat', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 400;
    color: var(--black);
    background: var(--white);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color .2s ease;
}

button { font-family: inherit; cursor: pointer; }

::selection { background: var(--green); color: var(--black); }

/* Tokens de diseño */
:root {
    --black: #0a0a0a;
    --white: #ffffff;
    --green: #9FD630;       /* acento — usado muy sutil */
    --gray-100: #f7f7f7;
    --gray-200: #efefef;
    --gray-300: #e5e5e5;
    --gray-500: #9a9a9a;
    --gray-700: #444;
    --nav-height: 72px;
    --max-width: 1200px;
    --radius: 2px;
    --shadow: 0 30px 60px -20px rgba(0,0,0,.18);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

main { padding-top: var(--nav-height); }

/* =========================================
   BUTTONS
   ========================================= */
.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .3px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: all .2s ease;
    text-align: center;
    cursor: pointer;
}
.btn:disabled { opacity: .6; cursor: not-allowed; }

.btn-dark {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}
.btn-dark:hover:not(:disabled) {
    background: transparent;
    color: var(--black);
}

.btn-outline {
    background: transparent;
    color: var(--black);
    border-color: var(--black);
}
.btn-outline:hover:not(:disabled) {
    background: var(--black);
    color: var(--white);
}

.btn-green {
    background: var(--green);
    color: var(--black);
    border-color: var(--green);
    font-weight: 700;
}
.btn-green:hover:not(:disabled) {
    background: transparent;
    color: var(--white);
}

.btn-full { width: 100%; }

/* =========================================
   NAV
   ========================================= */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 0;
    z-index: 100;
}
.nav-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo img { height: 28px; }

.nav-links {
    display: flex;
    gap: 36px;
}
.nav-links a {
    font-size: 14px;
    font-weight: 500;
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    left: 0; right: 100%;
    bottom: -4px;
    height: 2px;
    background: var(--green);
    transition: right .25s ease;
}
.nav-links a:hover::after { right: 0; }

.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: 0;
    padding: 8px;
}
.nav-burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--black);
    transition: transform .2s, opacity .2s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================
   FOOTER
   ========================================= */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 56px 0 32px;
}
.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
    text-align: center;
}
.footer-brand img { height: 22px; }
.footer-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    justify-content: center;
}
.footer-links a {
    font-size: 13px;
    color: var(--gray-500);
}
.footer-links a:hover { color: var(--green); }
.footer-copy {
    font-size: 12px;
    color: var(--gray-500);
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 720px) {
    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0; right: 0;
        flex-direction: column;
        background: var(--white);
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid var(--gray-200);
        display: none;
    }
    .nav-links.open { display: flex; }
    .nav-links a { font-size: 16px; }
    .nav-links a::after { display: none; }
    .nav-burger { display: flex; }
}