/* ============================================================
   ECO COOLING SOLUTIONS — SHARED DESIGN SYSTEM
   shared.css — v2.0
============================================================ */

/* ============================================================
   DESIGN TOKENS
============================================================ */
:root {
    --primary:        #0077B6;
    --primary-dark:   #023E8A;
    --primary-light:  #0096C7;
    --accent:         #00B4D8;
    --accent-light:   #CAF0F8;
    --cta:            #F77F00;
    --cta-hover:      #D96B00;
    --dark:           #0D1B2A;
    --dark-mid:       #1B2A4A;
    --surface:        #F0F7FA;
    --surface-alt:    #E8F4FA;
    --white:          #FFFFFF;
    --text:           #1A2535;
    --text-mid:       #3D5066;
    --text-light:     #6B7E94;
    --border:         #D4E6F1;
    --success:        #22C55E;
    --wa-green:       #25D366;

    --shadow-sm:   0 1px 4px rgba(0,60,110,.08);
    --shadow-md:   0 4px 16px rgba(0,60,110,.12);
    --shadow-lg:   0 8px 32px rgba(0,60,110,.15);
    --shadow-xl:   0 16px 48px rgba(0,60,110,.18);

    --r-sm:  6px;
    --r-md:  12px;
    --r-lg:  20px;
    --r-xl:  28px;
    --r-full: 999px;

    --s1:  4px;   --s2:  8px;   --s3:  12px;
    --s4:  16px;  --s5:  24px;  --s6:  32px;
    --s7:  48px;  --s8:  64px;  --s9:  96px;

    --font-head: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;

    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --t-fast:   150ms;
    --t-base:   250ms;
    --t-slow:   400ms;
}

/* ============================================================
   RESET
============================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--white);
    overflow-x: hidden;
}
h1,h2,h3,h4,h5,h6 { font-family: var(--font-head); line-height: 1.2; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 var(--s5); }

/* ============================================================
   BUTTONS
============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--s2);
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: .3px;
    border-radius: var(--r-full);
    padding: 14px 28px;
    transition: all var(--t-base) var(--ease-out);
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 48px;
    white-space: nowrap;
}
.btn-primary {
    background: var(--cta);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(247,127,0,.3);
}
.btn-primary:hover {
    background: var(--cta-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(247,127,0,.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,.6);
}
.btn-outline:hover {
    background: rgba(255,255,255,.15);
    border-color: var(--white);
}
.btn-blue {
    background: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}
.btn-blue:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.btn-wa {
    background: var(--wa-green);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(37,211,102,.35);
}
.btn-wa:hover {
    background: #1da851;
    transform: translateY(-2px);
}
.btn-white-solid {
    background: var(--white);
    color: var(--cta);
    font-family: var(--font-head);
    font-weight: 700;
}
.btn-white-solid:hover {
    background: rgba(255,255,255,.9);
    transform: translateY(-2px);
}

/* ============================================================
   HEADER
============================================================ */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    transition: all var(--t-base) var(--ease-out);
    padding: var(--s3) 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-md);
}
.header.transparent {
    background: transparent;
    box-shadow: none;
}
.header.transparent.scrolled {
    background: rgba(255,255,255,.97);
    box-shadow: var(--shadow-md);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s4);
}
.logo {
    display: flex;
    align-items: center;
    gap: var(--s3);
    flex-shrink: 0;
}
.logo-img {
    width: 52px; height: 52px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--surface);
    padding: 2px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--t-base) var(--ease-out);
}
.logo:hover .logo-img { transform: rotate(5deg) scale(1.06); }
.logo-img img { width: 100%; height: 100%; object-fit: contain; }
.logo-name {
    display: block;
    font-family: var(--font-head);
    font-size: 15px;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.2;
}
.logo-tag {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
}
.header.transparent .logo-name { color: var(--white); }
.header.transparent .logo-tag  { color: var(--accent-light); }
.header.transparent.scrolled .logo-name { color: var(--primary-dark); }
.header.transparent.scrolled .logo-tag  { color: var(--accent); }

.nav { display: flex; align-items: center; gap: var(--s1); }
.nav a {
    padding: var(--s2) var(--s3);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-mid);
    border-radius: var(--r-sm);
    transition: all var(--t-fast);
}
.nav a:hover, .nav a.active {
    color: var(--primary);
    background: var(--surface);
}
.header.transparent .nav a { color: rgba(255,255,255,.85); }
.header.transparent .nav a:hover,
.header.transparent .nav a.active {
    color: var(--white);
    background: rgba(255,255,255,.15);
}
.header.transparent.scrolled .nav a { color: var(--text-mid); }
.header.transparent.scrolled .nav a:hover,
.header.transparent.scrolled .nav a.active {
    color: var(--primary);
    background: var(--surface);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--s2);
    flex-shrink: 0;
}
.icon-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--border);
    color: var(--text-mid);
    transition: all var(--t-fast);
    cursor: pointer;
}
.icon-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--surface);
}
.icon-btn.wa { border-color: rgba(37,211,102,.4); color: var(--wa-green); }
.icon-btn.wa:hover { background: rgba(37,211,102,.08); border-color: var(--wa-green); }
.icon-btn svg { width: 18px; height: 18px; }

.header.transparent .icon-btn {
    border-color: rgba(255,255,255,.35);
    color: rgba(255,255,255,.85);
}
.header.transparent .icon-btn:hover {
    border-color: var(--white);
    color: var(--white);
    background: rgba(255,255,255,.12);
}
.header.transparent.scrolled .icon-btn {
    border-color: var(--border);
    color: var(--text-mid);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--s2);
    border-radius: var(--r-sm);
}
.hamburger span {
    display: block;
    width: 22px; height: 2px;
    background: var(--dark-mid);
    border-radius: 2px;
    transition: all var(--t-base);
}
.header.transparent .hamburger span { background: var(--white); }
.header.transparent.scrolled .hamburger span { background: var(--dark-mid); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--dark);
    z-index: 999;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--s4);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-base);
}
.mobile-nav.open { opacity: 1; pointer-events: all; }
.mobile-nav a {
    font-family: var(--font-head);
    font-size: 26px;
    font-weight: 700;
    color: rgba(255,255,255,.7);
    transition: color var(--t-fast);
}
.mobile-nav a:hover { color: var(--white); }
.mobile-nav .btn { margin-top: var(--s4); }

/* ============================================================
   PAGE HEADER BANNER (for inner pages)
============================================================ */
.page-banner {
    padding: 100px 0 64px;
    margin-top: 0;
    padding-top: 140px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--accent) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute;
    top: -80px; right: -80px;
    width: 400px; height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,180,216,.25), transparent 70%);
}
.page-banner .section-label { color: var(--accent-light); }
.page-banner h1 {
    font-size: clamp(30px, 5vw, 52px);
    font-weight: 900;
    color: var(--white);
    margin-bottom: var(--s3);
}
.page-banner p {
    font-size: 17px;
    color: rgba(255,255,255,.8);
    max-width: 540px;
    margin: 0 auto;
}
.page-banner-wave {
    position: absolute;
    bottom: -2px; left: 0; right: 0;
    line-height: 0;
}
.page-banner-wave svg { width: 100%; height: 60px; }

/* ============================================================
   SECTION UTILITIES
============================================================ */
.section-label {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--s3);
}
.section-title {
    font-size: clamp(24px, 3.5vw, 36px);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: var(--s3);
}
.section-sub {
    font-size: 16px;
    color: var(--text-light);
    max-width: 560px;
    line-height: 1.7;
}
.section-header { margin-bottom: var(--s7); }
.section-header.centered { text-align: center; }
.section-header.centered .section-sub { margin: 0 auto; }

.underline-deco {
    display: inline-block;
    position: relative;
}
.underline-deco::after {
    content: '';
    position: absolute;
    bottom: -6px; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: var(--r-full);
}

/* ============================================================
   CTA BAND
============================================================ */
.cta-band {
    padding: var(--s8) 0;
    background: linear-gradient(135deg, var(--cta) 0%, #e55f00 100%);
    position: relative;
    overflow: hidden;
}
.cta-band::before {
    content: '';
    position: absolute;
    top: -60px; right: -60px;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: rgba(255,255,255,.1);
}
.cta-band-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s5);
    flex-wrap: wrap;
}
.cta-band h2 {
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 800;
    color: var(--white);
    margin-bottom: var(--s2);
}
.cta-band p {
    font-size: 15px;
    color: rgba(255,255,255,.8);
}
.cta-band-btns {
    display: flex;
    gap: var(--s3);
    flex-wrap: wrap;
    flex-shrink: 0;
}

/* ============================================================
   FOOTER
============================================================ */
.footer {
    background: var(--dark);
    padding: var(--s8) 0 var(--s6);
    color: rgba(255,255,255,.65);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: var(--s7);
    margin-bottom: var(--s7);
    padding-bottom: var(--s7);
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand-desc {
    font-size: 14px;
    line-height: 1.7;
    margin: var(--s4) 0 var(--s5);
    max-width: 280px;
}
.footer-social { display: flex; gap: var(--s2); }
.footer-social a {
    width: 38px; height: 38px;
    border-radius: 50%;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,.6);
    transition: all var(--t-fast);
}
.footer-social a:hover { background: var(--primary); border-color: var(--primary); color: var(--white); }
.footer-social a svg { width: 16px; height: 16px; fill: currentColor; }
.footer-col h4 {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--white);
    margin-bottom: var(--s4);
}
.footer-col ul { list-style: none; }
.footer-col ul li + li { margin-top: var(--s3); }
.footer-col ul a { font-size: 14px; color: rgba(255,255,255,.55); transition: color var(--t-fast); }
.footer-col ul a:hover { color: var(--white); }
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--s3);
    font-size: 14px;
    margin-bottom: var(--s3);
}
.footer-contact-item svg { width: 16px; height: 16px; color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s4);
    flex-wrap: wrap;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.4); }

/* ============================================================
   WHATSAPP FLOAT
============================================================ */
.wa-float {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 58px; height: 58px;
    border-radius: 50%;
    background: var(--wa-green);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 24px rgba(37,211,102,.45);
    z-index: 998;
    transition: all var(--t-base);
    animation: wa-pulse 3s ease-in-out infinite;
}
.wa-float:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(37,211,102,.55); }
.wa-float svg { width: 28px; height: 28px; fill: var(--white); }
@keyframes wa-pulse {
    0%,100% { box-shadow: 0 6px 24px rgba(37,211,102,.45); }
    50%      { box-shadow: 0 6px 36px rgba(37,211,102,.65); }
}

/* ============================================================
   SCROLL REVEAL
============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 768px) {
    .nav { display: none; }
    .header-actions .icon-btn:not(.wa) { display: none; }
    .header-actions .btn { display: none; }
    .hamburger { display: flex; }
    .mobile-nav { display: flex; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--s5); }
    .footer-bottom { flex-direction: column; text-align: center; }
    .cta-band-inner { flex-direction: column; text-align: center; }
    .cta-band-btns { justify-content: center; }
}
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}