/*
Theme Name: Origen Minerals
Theme URI:
Author: Origen Minerals
Description: Tema personalizado – Origen Minerals SA
Version: 1.0
License: GNU General Public License v2 or later
Text Domain: origen-minerals
*/

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --orange: #E87722;
  --orange-d: #C96310;
  --dark: #1e1e1e;
  --dark2: #2c2c2c;
  --gray: #555;
  --mid: #888;
  --light: #f4f4f4;
  --white: #fff;
}
html { scroll-behavior: smooth; }
body { font-family: 'Montserrat', sans-serif; color: var(--dark2); background: var(--white); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 30px; }
.sec { padding: 90px 0; }
.sec-light { background: var(--light); }
.sec-dark { background: var(--dark2); color: var(--white); }
.sec-title { font-size: 2.1rem; font-weight: 800; text-align: center; margin-bottom: 12px; }
.sec-sub { font-size: 0.88rem; text-align: center; color: var(--mid); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 55px; }
.sec-dark .sec-title { color: var(--white); }
.sec-dark .sec-sub { color: rgba(255,255,255,0.45); }

.btn { display: inline-block; padding: 14px 34px; font-family: 'Montserrat', sans-serif; font-size: 0.8rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; cursor: pointer; border: 2px solid transparent; transition: all .3s; }
.btn-orange { background: var(--orange); color: var(--white); border-color: var(--orange); }
.btn-orange:hover { background: var(--orange-d); border-color: var(--orange-d); }
.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,.7); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ── NAVBAR ── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: transparent;
  box-shadow: none;
  transition: background .4s ease, box-shadow .4s ease;
}
#nav.scrolled {
  background: rgba(255,255,255,.97);
  box-shadow: 0 2px 20px rgba(0,0,0,.08);
}
.nav-wrap {
  max-width: 1400px; margin: 0 auto; padding: 0 35px;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.nav-right { display: flex; align-items: center; gap: 0; }
.nav-logo img {
  height: 65px;
  filter: brightness(0) invert(1);
  transition: filter .4s ease;
}
#nav.scrolled .nav-logo img { filter: none; }
.nav-links { display: flex; align-items: center; gap: 3px; }
.nav-links a {
  padding: 7px 15px; border-radius: 3px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: .4px;
  color: rgba(255,255,255,.9); transition: all .2s;
}
#nav.scrolled .nav-links a { color: var(--dark2); }
.nav-links a:hover { color: var(--orange) !important; }
.nav-links a.active { color: var(--orange) !important; }
.nav-cta {
  margin-left: 16px; padding: 8px 18px;
  border: none; background: var(--orange);
  font-family: 'Montserrat', sans-serif; font-size: 0.78rem; font-weight: 700;
  cursor: pointer; color: var(--white); letter-spacing: .5px;
  transition: all .3s; display: flex; align-items: center; gap: 6px;
  text-decoration: none;
}
.nav-cta:hover { background: var(--orange-d); color: var(--white) !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--dark2); transition: .3s; }

/* ── HERO ── */
#home {
  height: 100vh; min-height: 640px;
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  background-color: #111;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
.hero-bg-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to bottom, rgba(0,0,0,.75) 0%, rgba(0,0,0,.45) 40%, rgba(0,0,0,.45) 100%);
}
.hero-inner {
  position: relative; z-index: 2;
  text-align: center; color: var(--white); padding: 0 20px; max-width: 820px;
}
.hero-logo { width: min(600px, 65vw); height: auto; margin: 0 auto -70px; filter: brightness(0) invert(1); }
.hero-sub { font-size: clamp(.95rem, 1.8vw, 1.15rem); font-weight: 400; color: rgba(255,255,255,.85); margin: 0 auto 36px; max-width: 620px; line-height: 1.65; letter-spacing: .3px; }
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ── QUIÉNES SOMOS ── */
#empresa { background: var(--white); }
.empresa-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 60px; }
.empresa-intro-text p { font-size: .94rem; color: var(--gray); line-height: 1.9; margin-bottom: 12px; }
.empresa-intro-text p strong { color: var(--dark2); font-weight: 700; }
.empresa-intro-img-wrap { position: relative; }
.empresa-intro-img { width: 100%; height: 380px; object-fit: cover; object-position: center top; display: block; }
.empresa-intro-img-wrap::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 5px; background: var(--orange); }
.empresa-intro-img-wrap::before { content: ''; position: absolute; bottom: 5px; left: 0; right: 0; height: 60px; background: linear-gradient(to top, rgba(0,0,0,.35), transparent); z-index: 1; }
.mvv-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; }
.mvv-panel { padding: 55px 45px; position: relative; overflow: hidden; }
.mvv-panel::after { content: ''; position: absolute; width: 180px; height: 180px; border-radius: 50%; border: 2px solid rgba(255,255,255,.07); right: -40px; top: -40px; }
.mvv-dark { background: var(--dark2); color: var(--white); }
.mvv-orange { background: var(--orange); color: var(--white); }
.mvv-light { background: var(--light); color: var(--dark2); }
.mvv-panel h3 { font-size: 1.15rem; font-weight: 800; letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 20px; }
.mvv-panel p { font-size: .88rem; line-height: 1.85; }
.mvv-list li { font-size: .88rem; padding: 5px 0; display: flex; align-items: center; gap: 10px; }
.mvv-list li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); flex-shrink: 0; }
.mvv-dark .mvv-list li::before { background: rgba(255,255,255,.5); }

/* ── ¿POR QUÉ? ── */
#porque { background: var(--light); }
.pq-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 25px; margin-top: 10px; }
.pq-card { background: var(--white); padding: 42px 28px; text-align: center; border-bottom: 3px solid transparent; transition: all .3s; }
.pq-card:hover { transform: translateY(-7px); box-shadow: 0 14px 40px rgba(0,0,0,.09); border-bottom-color: var(--orange); }
.pq-icon { width: 68px; height: 68px; border-radius: 50%; background: var(--orange); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; font-size: 1.4rem; color: var(--white); }
.pq-card h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.pq-card p { font-size: .84rem; color: var(--gray); line-height: 1.75; }

/* ── MINERALES ── */
#minerales { background: var(--white); }
.core-badge { display: table; margin: 0 auto 16px; background: var(--orange); color: var(--white); padding: 5px 16px; font-size: .72rem; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; }
.min-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 25px; margin-top: 10px; }
.min-card { border-radius: 3px; overflow: hidden; box-shadow: 0 4px 22px rgba(0,0,0,.09); transition: transform .3s; }
.min-card:hover { transform: translateY(-5px); }
.min-img { width: 100%; height: 210px; object-fit: cover; transition: transform .5s; }
.min-card:hover .min-img { transform: scale(1.05); }
.min-body { padding: 24px 22px; background: var(--white); }
.min-tag { display: inline-block; background: var(--orange); color: var(--white); font-size: .68rem; font-weight: 800; letter-spacing: 1px; padding: 3px 10px; text-transform: uppercase; margin-bottom: 10px; }
.min-body h3 { font-size: 1rem; margin-bottom: 12px; font-weight: 700; }
.min-apps { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.min-apps span { background: var(--light); color: var(--gray); font-size: .7rem; font-weight: 600; padding: 4px 11px; border-radius: 20px; }
.min-note { font-size: .8rem; color: var(--mid); font-style: italic; border-top: 1px solid var(--light); padding-top: 12px; line-height: 1.6; }

/* ── PROYECTOS ── */
#proyectos { background: var(--dark); position: relative; }
#proyectos .sec-title { font-size: 3.5rem; }
.proy-bg { position: absolute; inset: 0; opacity: .13; background-size: cover !important; background-position: center !important; background-attachment: fixed !important; }
.proy-inner { position: relative; z-index: 2; }
.proy-card { max-width: 720px; margin: 10px auto 0; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.13); padding: 55px; backdrop-filter: blur(4px); }
.proy-loc { display: flex; align-items: center; gap: 8px; color: var(--orange); font-size: .82rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 18px; }
.proy-card h3 { font-size: 1.9rem; color: var(--white); margin-bottom: 18px; font-weight: 800; }
.proy-card p { font-size: .88rem; color: rgba(255,255,255,.75); line-height: 1.85; margin-bottom: 30px; }
.proy-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.proy-tags span { border: 1px solid rgba(255,255,255,.25); padding: 6px 16px; font-size: .76rem; font-weight: 600; color: rgba(255,255,255,.75); letter-spacing: .5px; }

/* ── SERVICIOS ── */
#servicios { background: var(--white); }
.srv-grid { display: grid; grid-template-columns: repeat(4,1fr); border: 1px solid #e8e8e8; margin-top: 10px; }
.srv-item { padding: 50px 28px; text-align: center; border-right: 1px solid #e8e8e8; transition: background .3s; }
.srv-item:last-child { border-right: none; }
.srv-item:hover { background: var(--light); }
.srv-circle { width: 88px; height: 88px; border-radius: 50%; border: 2px solid #ddd; display: flex; align-items: center; justify-content: center; margin: 0 auto 28px; position: relative; transition: border-color .3s; }
.srv-circle::before { content: ''; position: absolute; inset: 9px; border-radius: 50%; background: var(--dark2); transition: background .3s; }
.srv-item:hover .srv-circle { border-color: var(--orange); }
.srv-item:hover .srv-circle::before { background: var(--orange); }
.srv-circle i { position: relative; z-index: 1; font-size: 1.25rem; color: var(--white); }
.srv-item h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: 1.2px; margin-bottom: 20px; }
.srv-list li { font-size: .8rem; color: var(--gray); padding: 4px 0; padding-left: 14px; position: relative; text-align: left; }
.srv-list li::before { content: '—'; position: absolute; left: 0; color: var(--orange); font-size: .7rem; line-height: 1.8; }

/* ── LABORATORIO ── */
#laboratorio { background: var(--light); }
.lab-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 55px; align-items: center; margin-top: 10px; }
.lab-photos { display: flex; flex-direction: column; gap: 15px; }
.lab-photos img { width: 100%; object-fit: cover; }
.lab-photos img:first-child { height: 260px; }
.lab-photos img:last-child { height: 190px; }
.lab-content h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 18px; }
.lab-content p { font-size: .88rem; color: var(--gray); line-height: 1.85; margin-bottom: 28px; }
.lab-caps { display: flex; flex-direction: column; margin-bottom: 24px; border: 1px solid #e8e8e8; }
.lab-cap { display: flex; align-items: center; gap: 14px; padding: 15px 20px; background: var(--white); font-size: .88rem; font-weight: 600; color: var(--dark2); border-bottom: 1px solid #e8e8e8; transition: background .2s, border-left .2s; border-left: 3px solid transparent; }
.lab-cap:last-child { border-bottom: none; }
.lab-cap:hover { background: #fdf8f4; border-left-color: var(--orange); }
.lab-cap i { color: var(--orange); width: 20px; text-align: center; font-size: 1rem; flex-shrink: 0; }
.lab-note { padding: 16px 20px; background: var(--orange); color: var(--white); font-size: .84rem; line-height: 1.65; font-style: italic; }

/* ── INDUSTRIAS ── */
#industrias { background: var(--white); }
.ind-grid { display: grid; grid-template-columns: repeat(5,1fr); border: 1px solid #e8e8e8; margin-top: 10px; }
.ind-item { padding: 45px 18px; text-align: center; border-right: 1px solid #e8e8e8; cursor: default; transition: all .3s; }
.ind-item:last-child { border-right: none; }
.ind-item:hover { background: var(--orange); }
.ind-icon { font-size: 1.9rem; color: var(--orange); margin-bottom: 18px; transition: color .3s; }
.ind-item:hover .ind-icon { color: var(--white); }
.ind-item h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; transition: color .3s; }
.ind-item p { font-size: .76rem; color: var(--gray); line-height: 1.6; transition: color .3s; }
.ind-item:hover h3, .ind-item:hover p { color: var(--white); }

/* ── MERCADOS ── */
#mercados { background: var(--light); }
.mkt-intro { max-width: 750px; margin: 0 auto 50px; text-align: center; font-size: .9rem; color: var(--gray); line-height: 1.85; }
.mkt-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 25px; margin-bottom: 30px; }
.mkt-card { position: relative; padding: 40px 35px; border-top: 4px solid var(--orange); transition: all .3s; overflow: hidden; min-height: 280px; display: flex; flex-direction: column; justify-content: flex-end; }
.mkt-card-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform .5s ease; }
.mkt-card:hover .mkt-card-bg { transform: scale(1.06); }
.mkt-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.82) 0%, rgba(0,0,0,.4) 60%, rgba(0,0,0,.25) 100%); }
.mkt-card-content { position: relative; z-index: 2; }
.mkt-flag { font-size: 1.5rem; margin-bottom: 10px; }
.mkt-card h3 { font-size: 1.1rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 14px; color: var(--white); }
.mkt-card ul li { font-size: .84rem; color: rgba(255,255,255,.85); padding: 5px 0; border-bottom: 1px solid rgba(255,255,255,.15); display: flex; align-items: center; gap: 8px; }
.mkt-card ul li:last-child { border-bottom: none; }
.mkt-card ul li::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--orange); flex-shrink: 0; }
.vent-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-top: 30px; }
.vent-item { text-align: center; padding: 32px 20px; background: var(--white); border-bottom: 3px solid var(--orange); }
.vent-item i { font-size: 1.7rem; color: var(--orange); margin-bottom: 14px; }
.vent-item p { font-size: .8rem; color: var(--gray); font-weight: 600; line-height: 1.5; }

/* ── EQUIPO ── */
#equipo { background: var(--dark2); }
.eq-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 15px; margin-top: 10px; }
.eq-item { padding: 28px 18px; text-align: center; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); transition: all .3s; }
.eq-item:hover { background: var(--orange); border-color: var(--orange); }
.eq-item i { font-size: 1.4rem; color: var(--orange); margin-bottom: 12px; display: block; transition: color .3s; }
.eq-item:hover i { color: var(--white); }
.eq-item p { font-size: .8rem; font-weight: 600; color: rgba(255,255,255,.85); line-height: 1.4; }

/* ── SUSTENTABILIDAD ── */
#sustentabilidad { background: var(--white); }
.sust-top { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 60px; }
.sust-top-img { width: 100%; height: 380px; object-fit: cover; }
.sust-intro { font-size: .92rem; color: var(--gray); line-height: 1.9; }
.sust-panels { display: grid; grid-template-columns: repeat(4,1fr); }
.sust-p { padding: 55px 30px; text-align: center; }
.sust-p:nth-child(1) { background: var(--dark2); color: var(--white); }
.sust-p:nth-child(2) { background: var(--orange); color: var(--white); }
.sust-p:nth-child(3) { background: #3a3a3a; color: var(--white); }
.sust-p:nth-child(4) { background: var(--light); color: var(--dark2); }
.sust-p i { font-size: 2rem; margin-bottom: 20px; display: block; }
.sust-p h3 { font-size: .82rem; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; }

/* ── CONTACTO ── */
#contacto { background: var(--light); }
.ct-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 60px; margin-top: 10px; }
.ct-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 32px; }
.ct-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.ct-icon { width: 46px; height: 46px; background: var(--orange); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--white); font-size: 1rem; }
.ct-text p:first-child { font-size: .72rem; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--mid); margin-bottom: 3px; }
.ct-text p:last-child { font-size: .9rem; color: var(--dark2); font-weight: 500; }
.ct-form { background: var(--white); padding: 50px; }
.frow { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.fg { margin-bottom: 20px; }
.fg label { display: block; font-size: .72rem; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--mid); margin-bottom: 8px; }
.fg input, .fg textarea { width: 100%; padding: 12px 15px; border: 1px solid #ddd; background: var(--white); font-family: 'Montserrat', sans-serif; font-size: .86rem; color: var(--dark2); outline: none; transition: border-color .2s; }
.fg input:focus, .fg textarea:focus { border-color: var(--orange); }
.fg textarea { height: 130px; resize: vertical; }
.fsub { width: 100%; padding: 15px; background: var(--orange); color: var(--white); border: none; font-family: 'Montserrat', sans-serif; font-size: .82rem; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; cursor: pointer; transition: background .3s; }
.fsub:hover { background: var(--orange-d); }

/* ── FOOTER ── */
footer { background: #111; color: rgba(255,255,255,.7); padding: 65px 0 28px; }
.ft-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 50px; }
.ft-logo { height: 48px; margin-bottom: 18px; }
.ft-tag { font-size: .78rem; color: rgba(255,255,255,.4); letter-spacing: 1px; margin-bottom: 8px; }
.ft-loc { font-size: .84rem; margin-bottom: 4px; }
.ft-col h4 { font-size: .72rem; letter-spacing: 2px; text-transform: uppercase; color: var(--white); margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,.1); }
.ft-col ul li { margin-bottom: 8px; }
.ft-col ul li a { font-size: .82rem; color: rgba(255,255,255,.55); transition: color .2s; }
.ft-col ul li a:hover { color: var(--orange); }
.soc { display: flex; gap: 10px; margin-top: 22px; }
.soc a { width: 38px; height: 38px; border: 1px solid rgba(255,255,255,.18); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.55); font-size: .88rem; transition: all .2s; }
.soc a:hover { background: var(--orange); border-color: var(--orange); color: var(--white); }
.ft-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; }
.ft-bottom p { font-size: .76rem; color: rgba(255,255,255,.35); }

/* ── WHATSAPP FLOTANTE ── */
.wa-float { position: fixed; bottom: 28px; right: 28px; z-index: 999; width: 58px; height: 58px; border-radius: 50%; background: #25D366; color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; text-decoration: none; box-shadow: 0 4px 22px rgba(37,211,102,.45); transition: transform .3s, box-shadow .3s; }
.wa-float:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(37,211,102,.65); }

/* ── SCROLL TOP ── */
#scrollTop { position: fixed; bottom: 98px; right: 28px; width: 44px; height: 44px; background: var(--dark2); color: var(--white); border: none; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; pointer-events: none; transition: all .3s; z-index: 999; font-size: .95rem; }
#scrollTop.show { opacity: 1; pointer-events: auto; }
#scrollTop:hover { background: var(--orange); }

/* ── RESPONSIVE ── */
@media (max-width: 1100px) {
  .pq-grid { grid-template-columns: repeat(2,1fr); }
  .min-grid { grid-template-columns: repeat(2,1fr); }
  .srv-grid { grid-template-columns: repeat(2,1fr); }
  .srv-item:nth-child(2) { border-right: none; }
  .ind-grid { grid-template-columns: repeat(3,1fr); }
  .ind-item:nth-child(3) { border-right: none; }
  .mkt-grid { grid-template-columns: 1fr 1fr; }
  .vent-row { grid-template-columns: repeat(2,1fr); }
  .eq-grid { grid-template-columns: repeat(3,1fr); }
  .ft-grid { grid-template-columns: 1fr 1fr; }
  .sust-panels { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .sec { padding: 65px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: var(--white); padding: 16px 24px; box-shadow: 0 10px 25px rgba(0,0,0,.12); gap: 4px; }
  .mvv-grid { grid-template-columns: 1fr; }
  .pq-grid { grid-template-columns: 1fr; }
  .min-grid { grid-template-columns: 1fr; }
  .srv-grid { grid-template-columns: 1fr; }
  .srv-item { border-right: none; border-bottom: 1px solid #e8e8e8; padding: 38px 24px; }
  .srv-item:last-child { border-bottom: none; }
  .lab-grid { grid-template-columns: 1fr; }
  .empresa-intro { grid-template-columns: 1fr; }
  .empresa-intro-img { height: 250px; }
  .sust-top { grid-template-columns: 1fr; }
  .sust-top-img { height: 250px; }
  .ind-grid { grid-template-columns: repeat(2,1fr); }
  .mkt-grid { grid-template-columns: 1fr; }
  .vent-row { grid-template-columns: repeat(2,1fr); }
  .eq-grid { grid-template-columns: repeat(2,1fr); }
  .sust-panels { grid-template-columns: 1fr 1fr; }
  .ct-grid { grid-template-columns: 1fr; }
  .ct-form { padding: 32px 24px; }
  .frow { grid-template-columns: 1fr; }
  .ft-grid { grid-template-columns: 1fr; }
  .ft-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .proy-card { padding: 36px 28px; }
  .hero-btns { flex-direction: column; align-items: center; }
  .mvv-panel { padding: 40px 30px; }
  .container { padding: 0 18px; }
  .sec-title { font-size: 1.75rem; }
  .hamburger span { background: var(--white); }
  #nav.scrolled .hamburger span { background: var(--dark2); }
  #nav.menu-open { background: rgba(255,255,255,.97) !important; box-shadow: 0 2px 20px rgba(0,0,0,.08) !important; }
  #nav.menu-open .nav-logo img { filter: none !important; }
  #nav.menu-open .hamburger span { background: var(--dark2) !important; }
  .nav-links.open a { color: var(--dark2) !important; }
  .hero-logo { margin-bottom: -40px; }
  .proy-card { padding: 28px 20px; }
  #proyectos .sec-title { font-size: 2.2rem; }
}
@media (max-width: 480px) {
  .sec { padding: 50px 0; }
  .sec-title { font-size: 1.4rem; }
  .pq-grid { grid-template-columns: 1fr; }
  .ind-grid { grid-template-columns: 1fr; }
  .ind-item { border-right: none; border-bottom: 1px solid #e8e8e8; }
  .vent-row { grid-template-columns: 1fr; }
  .eq-grid { grid-template-columns: 1fr; }
  .sust-panels { grid-template-columns: 1fr; }
}