/* ============================================================
   DESIGN SYSTEM — RiverScape Security 2025
   ============================================================ */
:root {
    --bg-deep: #060b18;
    --bg-surface: #0d1424;
    --bg-card: rgba(15, 23, 42, 0.55);
    --accent-cyan: #00e5ff;
    --accent-amber: #ff9500;
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --glass-border: rgba(0, 229, 255, 0.12);
    --glass-blur: 18px;
    --radius: 16px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-primary);
    background: var(--bg-deep);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.65;
}

/* ---- Animated gradient mesh background ---- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        radial-gradient(ellipse 80% 60% at 20% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse 60% 80% at 80% 70%, rgba(255, 149, 0, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 90% 50% at 50% 50%, rgba(99, 102, 241, 0.07) 0%, transparent 60%);
    animation: meshDrift 20s ease-in-out infinite alternate;
}

@keyframes meshDrift {
    0% {
        transform: scale(1) translate(0, 0);
    }

    50% {
        transform: scale(1.1) translate(-3%, 2%);
    }

    100% {
        transform: scale(1) translate(2%, -1%);
    }
}

/* Subtle noise/texture overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image: url('images/backgrounds/back1.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.06;
    pointer-events: none;
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color .2s;
}

a:hover {
    color: #66f0ff;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: background .4s, backdrop-filter .4s, padding .3s;
}

.site-nav.scrolled {
    background: rgba(6, 11, 24, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: .6rem 0;
    box-shadow: 0 1px 20px rgba(0, 0, 0, .4);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: .65rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text-primary) !important;
}

.nav-brand img {
    height: 38px;
    border-radius: 6px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: .93rem;
    letter-spacing: .02em;
    position: relative;
    transition: color .25s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width .3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary) !important;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Language selector */
.lang-btn {
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid var(--glass-border);
    color: var(--accent-cyan);
    padding: .4rem .85rem;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: .85rem;
    font-weight: 500;
    transition: all .25s;
}

.lang-btn:hover {
    background: rgba(0, 229, 255, 0.15);
    border-color: rgba(0, 229, 255, 0.3);
}

.lang-switcher {
    position: relative;
}

.lang-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: rgba(13, 20, 36, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    overflow: hidden;
    min-width: 140px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, .5);
}

.lang-dropdown.open {
    display: block;
}

.lang-dropdown button {
    display: block;
    width: 100%;
    padding: .6rem 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: .88rem;
    text-align: left;
    cursor: pointer;
    transition: all .2s;
}

.lang-dropdown button:hover {
    background: rgba(0, 229, 255, 0.08);
    color: var(--text-primary);
}

/* Mobile hamburger */
.nav-toggle {
    display: none;
    background: none;
    border: 2px solid rgba(0, 229, 255, 0.3);
    border-radius: 8px;
    padding: .4rem .5rem;
    cursor: pointer;
    color: var(--accent-cyan);
    font-size: 1.3rem;
    transition: border-color .25s;
}

.nav-toggle:hover {
    border-color: var(--accent-cyan);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 1.5rem 4rem;
    position: relative;
}

.hero-content {
    max-width: 820px;
}

.hero h1 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: clamp(2.2rem, 6vw, 3.8rem);
    line-height: 1.15;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .tagline {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    min-height: 1.6em;
}

.hero .tagline .cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent-cyan);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink .7s steps(1) infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.scroll-hint {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .5rem;
    color: var(--text-secondary);
    font-size: .75rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    opacity: .6;
    animation: floatHint 2.5s ease-in-out infinite;
}

.scroll-hint i {
    font-size: 1.1rem;
    color: var(--accent-cyan);
}

@keyframes floatHint {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(8px);
    }
}

/* ============================================================
   SERVICES
   ============================================================ */
.services {
    padding: 5rem 1.5rem 6rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-heading {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-heading h2 {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    margin-bottom: .5rem;
}

.section-heading p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

/* Glass card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    text-align: center;
    transition: transform .35s cubic-bezier(.22, 1, .36, 1),
        box-shadow .35s cubic-bezier(.22, 1, .36, 1),
        border-color .35s;
    /* Scroll reveal initial state */
    opacity: 0;
    transform: translateY(40px);
}

.glass-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow:
        0 0 30px rgba(0, 229, 255, 0.08),
        0 20px 60px rgba(0, 0, 0, .35);
    border-color: rgba(0, 229, 255, 0.25);
}

.card-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.1), rgba(255, 149, 0, 0.08));
    font-size: 1.8rem;
    color: var(--accent-cyan);
    transition: transform .4s, box-shadow .4s;
}

.glass-card:hover .card-icon {
    transform: scale(1.1);
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
}

.glass-card:nth-child(2) .card-icon {
    color: var(--accent-amber);
}

.glass-card:nth-child(3) .card-icon {
    color: #a78bfa;
}

.glass-card h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.3rem;
    margin-bottom: .85rem;
}

.glass-card p {
    color: var(--text-secondary);
    font-size: .92rem;
    line-height: 1.7;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
    margin-top: auto;
    background: rgba(6, 11, 24, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 1.5rem 2rem;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: start;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: .6rem;
}

.footer-brand img {
    height: 32px;
    border-radius: 6px;
}

.footer-col p {
    color: var(--text-secondary);
    font-size: .85rem;
    margin: .25rem 0;
}

.footer-col a {
    color: var(--accent-cyan) !important;
}

.footer-col a:hover {
    color: #66f0ff !important;
}

.footer-center {
    text-align: center;
}

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: .75rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary) !important;
    font-size: 1.1rem;
    transition: all .25s;
}

.footer-social a:hover {
    background: rgba(0, 229, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan) !important;
    transform: translateY(-3px);
}

.footer-right {
    text-align: right;
}

.footer-right p {
    color: var(--text-secondary);
    font-size: .85rem;
    margin: .25rem 0;
}

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(148, 163, 184, 0.08);
    text-align: center;
    color: var(--text-secondary);
    font-size: .8rem;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
    body::after {
        background-attachment: scroll;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(6, 11, 24, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 1.5rem;
        gap: 1rem;
        border-top: 1px solid var(--glass-border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a::after {
        display: none;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-right {
        text-align: center;
    }

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

@media (max-width: 576px) {
    .hero {
        padding: 5rem 1.25rem 3rem;
    }

    .services {
        padding: 3rem 1.25rem 4rem;
    }
}

/* Card stagger animation */
.glass-card {
    transition: opacity .6s cubic-bezier(.22, 1, .36, 1), transform .6s cubic-bezier(.22, 1, .36, 1);
}

.glass-card:nth-child(2) {
    transition-delay: .12s;
}

.glass-card:nth-child(3) {
    transition-delay: .24s;
}