/* ============================================================
   ALWISP – Mesh Network Solutions
   Brand palette extracted from logo:
     --navy:   #0d1b3e  (darkest bg)
     --blue:   #1565c0  (primary mid)
     --teal:   #00bcd4  (accent highlight)
     --orange: #f57c00  (mesh node accent)
     --white:  #ffffff
   ============================================================ */

/* ── RESET & BASE ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Brand */
    --navy:      #0d1b3e;
    --navy-mid:  #132145;
    --blue:      #1565c0;
    --blue-light:#1e88e5;
    --teal:      #00bcd4;
    --teal-dark: #00acc1;
    --orange:    #f57c00;
    --orange-lt: #ffb74d;

    /* Neutrals */
    --white:     #ffffff;
    --off-white: #f0f4f8;
    --gray-100:  #e8edf3;
    --gray-300:  #b0bec5;
    --gray-500:  #607d8b;
    --gray-700:  #37474f;
    --gray-900:  #1a2332;

    /* Gradients */
    --grad-hero: linear-gradient(135deg, #0d1b3e 0%, #1565c0 60%, #00bcd4 100%);
    --grad-text: linear-gradient(90deg, #f57c00, #00bcd4);
    --grad-cta:  linear-gradient(135deg, #1565c0, #00bcd4);

    /* Typography */
    --font-body:     'Inter', system-ui, sans-serif;
    --font-heading:  'Space Grotesk', system-ui, sans-serif;

    /* Layout */
    --max-width: 1200px;
    --section-py: 5rem;
    --nav-h: 70px;

    /* Radius */
    --r-sm:  6px;
    --r-md:  12px;
    --r-lg:  20px;
    --r-full: 9999px;

    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,.18);
    --shadow-lg: 0 10px 40px rgba(0,0,0,.28);

    /* Transition */
    --t-fast: 0.18s ease;
    --t-base: 0.28s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--navy);
    color: var(--white);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--teal); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--orange-lt); }

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

ul { list-style: none; }

/* ── UTILITIES ──────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent { color: var(--teal); }

.section { padding-block: var(--section-py); }
.section--alt { background: var(--navy-mid); }

.section__header { text-align: center; margin-bottom: 3rem; }
.section__eyebrow {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--teal);
    display: block;
    margin-bottom: .5rem;
}
.section__heading {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--white);
}
.section__sub {
    margin-top: .75rem;
    color: var(--gray-300);
    font-size: 1.05rem;
    max-width: 600px;
    margin-inline: auto;
}

.placeholder-block {
    background: rgba(255,255,255,.05);
    border: 1px dashed rgba(255,255,255,.15);
    border-radius: var(--r-md);
    padding: 3rem 2rem;
    text-align: center;
    color: var(--gray-300);
    font-size: .95rem;
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: var(--r-full);
    font-family: var(--font-heading);
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--t-base);
    white-space: nowrap;
}

.btn--primary {
    background: var(--grad-cta);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(0,188,212,.3);
}
.btn--primary:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,188,212,.45);
}

.btn--ghost {
    background: transparent;
    border-color: rgba(255,255,255,.35);
    color: var(--white);
}
.btn--ghost:hover {
    border-color: var(--teal);
    color: var(--teal);
    background: rgba(0,188,212,.08);
}

/* ── NAV ────────────────────────────────────────────────────── */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--nav-h);
    background: rgba(13,27,62,.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,.07);
    transition: background var(--t-base), box-shadow var(--t-base);
}
.site-header.scrolled {
    background: rgba(13,27,62,.97);
    box-shadow: var(--shadow-md);
}

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

.nav__logo {
    display: flex;
    align-items: center;
    gap: .6rem;
    text-decoration: none;
}
.nav__logo-img { height: 38px; width: auto; }
.nav__logo-text {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: .04em;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: .25rem;
}
.nav__link {
    display: block;
    padding: .5rem .9rem;
    border-radius: var(--r-full);
    font-size: .9rem;
    font-weight: 500;
    color: rgba(255,255,255,.8);
    transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover { color: var(--white); background: rgba(255,255,255,.08); }

.nav__link--cta {
    background: var(--grad-cta);
    color: var(--white) !important;
    padding: .5rem 1.2rem;
    font-weight: 600;
}
.nav__link--cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,188,212,.4);
    background: var(--grad-cta);
}

/* Hamburger */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: .5rem;
}
.nav__toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: transform var(--t-base), opacity var(--t-base);
}

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--nav-h);
    background: var(--grad-hero);
}

.hero__mesh-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0,188,212,.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(21,101,192,.18) 0%, transparent 45%),
        radial-gradient(circle at 60% 80%, rgba(245,124,0,.07) 0%, transparent 40%);
    /* Mesh dot pattern */
    background-image:
        radial-gradient(circle at 20% 50%, rgba(0,188,212,.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(21,101,192,.18) 0%, transparent 45%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Ccircle cx='30' cy='30' r='1' fill='rgba(255,255,255,0.06)'/%3E%3C/svg%3E");
    background-repeat: no-repeat, no-repeat, repeat;
    animation: meshPulse 8s ease-in-out infinite alternate;
}

@keyframes meshPulse {
    from { opacity: .7; }
    to   { opacity: 1; }
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 680px;
    padding: 3rem 3.5rem;
    background: rgba(8, 14, 38, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--r-lg);
    margin-block: 4rem;
}

.hero__eyebrow {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .15em;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 1rem;
}

.hero__heading {
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.hero__sub {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: rgba(255,255,255,.78);
    max-width: 560px;
    margin-bottom: 2rem;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero__scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .4rem;
}
.hero__scroll-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--teal);
    animation: scrollBounce 1.8s ease-in-out infinite;
    opacity: .6;
}
@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); opacity: .6; }
    50%       { transform: translateY(8px); opacity: 1; }
}

/* ── STATS BAR ──────────────────────────────────────────────── */
.stats-bar {
    background: rgba(255,255,255,.04);
    border-top: 1px solid rgba(255,255,255,.07);
    border-bottom: 1px solid rgba(255,255,255,.07);
    padding-block: 2.5rem;
}
.stats-bar__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    text-align: center;
}
.stat__value {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--teal);
}
.stat__unit {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--teal);
}
.stat__label {
    display: block;
    font-size: .82rem;
    color: var(--gray-300);
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-top: .25rem;
}

/* ── CARDS ──────────────────────────────────────────────────── */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.card {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--r-lg);
    padding: 2rem 1.75rem;
    transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.card--hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(0,0,0,.35);
    border-color: rgba(0,188,212,.3);
}

.card__icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1.25rem;
    color: var(--teal);
}
.card__icon svg { width: 100%; height: 100%; }

.card__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: .6rem;
}
.card__body {
    color: var(--gray-300);
    font-size: .93rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
}
.card__link {
    font-weight: 600;
    font-size: .88rem;
    color: var(--teal);
    letter-spacing: .03em;
}
.card__link:hover { color: var(--orange-lt); }

/* ── WHY ALWISP ─────────────────────────────────────────────── */
.why__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.why__text .section__heading { text-align: left; }
.why__text p {
    color: var(--gray-300);
    margin-block: 1rem 1.5rem;
    max-width: 480px;
}
.why__list {
    display: flex;
    flex-direction: column;
    gap: .6rem;
}
.why__list li {
    display: flex;
    align-items: center;
    gap: .75rem;
    font-size: .95rem;
    color: rgba(255,255,255,.85);
}
.why__check {
    color: var(--teal);
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

/* Mesh SVG diagram */
.why__visual { display: flex; justify-content: center; }
.mesh-diagram { width: 100%; max-width: 380px; }
.mesh-svg { width: 100%; height: auto; }

.mesh-node {
    filter: drop-shadow(0 0 6px currentColor);
}
.mesh-node--tower {
    filter: drop-shadow(0 0 10px rgba(245,124,0,.8));
    animation: nodePulse 2.5s ease-in-out infinite;
}
@keyframes nodePulse {
    0%, 100% { r: 12; opacity: .9; }
    50%       { r: 14; opacity: 1; }
}

/* ── CTA BAND ───────────────────────────────────────────────── */
.cta-band {
    background: linear-gradient(135deg, rgba(21,101,192,.25), rgba(0,188,212,.15));
    border-top: 1px solid rgba(0,188,212,.2);
    border-bottom: 1px solid rgba(0,188,212,.2);
}
.cta-band__content { text-align: center; }
.cta-band__heading {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 700;
    margin-bottom: .6rem;
}
.cta-band__sub { color: var(--gray-300); margin-bottom: 1.75rem; }
.cta-band__form {
    display: flex;
    gap: .75rem;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 560px;
    margin-inline: auto;
}
.cta-band__input {
    flex: 1;
    min-width: 240px;
    padding: .75rem 1.25rem;
    border-radius: var(--r-full);
    border: 1px solid rgba(255,255,255,.2);
    background: rgba(255,255,255,.07);
    color: var(--white);
    font-size: .95rem;
    outline: none;
    transition: border-color var(--t-fast), background var(--t-fast);
}
.cta-band__input::placeholder { color: var(--gray-300); }
.cta-band__input:focus {
    border-color: var(--teal);
    background: rgba(255,255,255,.12);
}

/* ── PAGE HERO ──────────────────────────────────────────────── */
.page-hero {
    padding-top: calc(var(--nav-h) + 3rem);
    padding-bottom: 3rem;
    background: linear-gradient(135deg, #0d1b3e 0%, #132145 100%);
    border-bottom: 1px solid rgba(255,255,255,.06);
    text-align: center;
}

/* ── CONTACT ────────────────────────────────────────────────── */
.contact__grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: start;
}
.contact__heading {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}
.contact__details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    color: var(--gray-300);
    font-size: .95rem;
    line-height: 1.7;
}
.contact__details a { color: var(--teal); }

/* ── FORM ───────────────────────────────────────────────────── */
.form { display: flex; flex-direction: column; gap: 1.25rem; }
.form__row { display: flex; gap: 1rem; }
.form__row--2 > * { flex: 1; }
.form__group { display: flex; flex-direction: column; gap: .4rem; }
.form__label {
    font-size: .85rem;
    font-weight: 500;
    color: var(--gray-300);
}
.form__label span { color: var(--teal); }
.form__input {
    padding: .7rem 1rem;
    border-radius: var(--r-sm);
    border: 1px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.06);
    color: var(--white);
    font-size: .95rem;
    font-family: var(--font-body);
    outline: none;
    transition: border-color var(--t-fast);
}
.form__input:focus { border-color: var(--teal); background: rgba(255,255,255,.1); }
.form__textarea { resize: vertical; min-height: 130px; }
select.form__input option { background: var(--navy); }

/* ── ALERTS ─────────────────────────────────────────────────── */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--r-sm);
    font-size: .93rem;
    margin-bottom: 1.25rem;
}
.alert--success { background: rgba(0,188,212,.15); border: 1px solid rgba(0,188,212,.4); color: #b2ebf2; }
.alert--error   { background: rgba(229,57,53,.15);  border: 1px solid rgba(229,57,53,.4);  color: #ffcdd2; }
.alert ul { list-style: disc; padding-left: 1.25rem; }

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
    background: #080f1f;
    border-top: 1px solid rgba(255,255,255,.07);
    padding-top: 3.5rem;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
}
.footer__tagline {
    color: var(--gray-300);
    font-size: .9rem;
    line-height: 1.7;
    margin-top: .75rem;
}
.footer__heading {
    font-family: var(--font-heading);
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--teal);
    margin-bottom: 1rem;
}
.footer__links ul { display: flex; flex-direction: column; gap: .5rem; }
.footer__links a {
    color: var(--gray-300);
    font-size: .9rem;
}
.footer__links a:hover { color: var(--white); }
.footer__contact p {
    color: var(--gray-300);
    font-size: .9rem;
    margin-bottom: .5rem;
}
.footer__contact a { color: var(--gray-300); }
.footer__contact a:hover { color: var(--teal); }
.footer__social {
    display: flex;
    gap: .5rem;
    margin-top: 1rem;
}
.footer__social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--r-sm);
    background: rgba(255,255,255,.07);
    font-size: .72rem;
    font-weight: 700;
    color: var(--gray-300);
    transition: background var(--t-fast), color var(--t-fast);
}
.footer__social-link:hover { background: var(--teal); color: var(--white); }
.footer__bottom {
    padding-block: 1.25rem;
    border-top: 1px solid rgba(255,255,255,.06);
    text-align: center;
    color: var(--gray-500);
    font-size: .82rem;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .why__grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .why__visual { display: none; }
    .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --section-py: 3.5rem; }

    /* Mobile nav */
    .nav__toggle { display: flex; }

    .nav__menu {
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        background: rgba(13,27,62,.98);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem 1.5rem 2rem;
        gap: .25rem;
        border-bottom: 1px solid rgba(255,255,255,.1);
        transform: translateY(-110%);
        opacity: 0;
        transition: transform var(--t-base), opacity var(--t-base);
        pointer-events: none;
    }
    .nav__menu.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav__link { padding: .75rem 1rem; border-radius: var(--r-sm); }
    .nav__link--cta { text-align: center; margin-top: .5rem; }

    .stats-bar__grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
    .contact__grid { grid-template-columns: 1fr; gap: 2rem; }
    .form__row--2 { flex-direction: column; }
    .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 480px) {
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { text-align: center; justify-content: center; }
    .stats-bar__grid { grid-template-columns: 1fr 1fr; }
    .cta-band__form { flex-direction: column; }
    .cta-band__input { min-width: 100%; }
}