/* ==========================================================================
   Buceo Calahonda — Dark deep-sea themed one-page site
   Palette derived from the underwater reference image:
   abyss navy, teal god-rays, sandy caustic light on the sea floor
   ========================================================================== */

:root{
  --abyss-950: #030a0f;
  --abyss-900: #061620;
  --abyss-800: #0a222f;
  --abyss-700: #0f2f3f;
  --teal-500: #4f9aa8;
  --teal-400: #7fc2c9;
  --teal-300: #a9dde0;
  --sea-glow: #8fd6c8;
  --moss-500: #6f8f5f;
  --moss-300: #b7d19a;
  --sand-200: #d9ceb3;
  --ink-100: #eef7f6;
  --ink-300: #c4d8d8;
  --ink-500: #83a0a2;

  --font-display: 'Cormorant Garamond', serif;
  --font-body: 'Montserrat', sans-serif;

  --ease-out: cubic-bezier(.16,.84,.44,1);
  --container: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--abyss-950);
  color: var(--ink-100);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a{ color: inherit; text-decoration: none; }

h1,h2,h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 .5em;
  color: var(--ink-100);
}

p{ margin: 0 0 1em; color: var(--ink-300); }

::selection{ background: var(--teal-500); color: var(--abyss-950); }

/* Background: deep gradient with subtle vignette, used behind all sections */
main, .site-footer{
  position: relative;
  background:
    radial-gradient(ellipse 120% 60% at 50% 0%, rgba(79,154,168,.10), transparent 60%),
    linear-gradient(180deg, var(--abyss-950) 0%, var(--abyss-900) 35%, var(--abyss-800) 70%, var(--abyss-950) 100%);
}

.eyebrow{
  text-transform: uppercase;
  letter-spacing: .22em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--teal-300);
  margin-bottom: .9em;
}

.btn{
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .95em 2em;
  border-radius: 100px;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .03em;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background .35s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary{
  background: linear-gradient(135deg, var(--teal-400), var(--teal-500));
  color: #04141b;
  box-shadow: 0 8px 30px -8px rgba(79,154,168,.6);
}
.btn-primary:hover{ transform: translateY(-3px); box-shadow: 0 14px 34px -6px rgba(79,154,168,.75); }
.btn-ghost{
  border-color: rgba(196,216,216,.35);
  color: var(--ink-100);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover{ border-color: var(--teal-300); background: rgba(127,194,201,.08); transform: translateY(-3px); }

/* ---------- Ambient particles (bubbles) ---------- */
.ambient{
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 3;
  overflow: hidden;
}
.bubble{
  position: absolute;
  bottom: -10%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255,255,255,.55), rgba(159,216,212,.05) 70%);
  border: 1px solid rgba(200,235,230,.18);
  opacity: 0;
  animation: rise linear infinite;
}
@keyframes rise{
  0%{ transform: translateY(0) translateX(0); opacity: 0; }
  8%{ opacity: .55; }
  90%{ opacity: .35; }
  100%{ transform: translateY(-115vh) translateX(var(--drift, 30px)); opacity: 0; }
}

/* ---------- Header ---------- */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 22px 0;
  transition: padding .4s var(--ease-out), background .4s, box-shadow .4s;
}
.site-header.scrolled{
  padding: 12px 0;
  background: rgba(4,14,20,.72);
  backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 10px 30px -15px rgba(0,0,0,.6);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-inner{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo{
  height: 60px;
  width: auto;
  display: block;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,.45));
  transition: transform .35s var(--ease-out), filter .35s, height .35s var(--ease-out);
}
.site-header.scrolled .brand-logo{ height: 46px; }
.brand:hover .brand-logo{ transform: translateY(-2px); filter: drop-shadow(0 6px 20px rgba(0,0,0,.55)); }
.brand-logo--footer{ height: 50px; }

.main-nav{ display: flex; align-items: center; gap: 2.1rem; }
.main-nav a{
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink-300);
  position: relative;
  padding: 4px 0;
  transition: color .3s;
}
.main-nav a:not(.nav-cta)::after{
  content:'';
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--teal-300);
  transition: width .3s var(--ease-out);
}
.main-nav a:not(.nav-cta):hover{ color: var(--ink-100); }
.main-nav a:not(.nav-cta):hover::after{ width: 100%; }
.main-nav a.nav-cta{
  padding: 1em 2em;
  margin-left: 1.6rem;
  background: rgba(127,194,201,.12);
  border: 1px solid rgba(127,194,201,.4);
  border-radius: 100px;
  color: var(--teal-300) !important;
}
.nav-cta:hover{ background: rgba(127,194,201,.22); }

.nav-toggle{
  display: none;
  position: relative;
  z-index: 80;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span{ width: 22px; height: 2px; background: var(--ink-100); border-radius: 2px; transition: transform .35s var(--ease-out), opacity .25s, background .3s; }
.nav-toggle.active span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2){ opacity: 0; }
.nav-toggle.active span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

.nav-backdrop{
  display: none;
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(3,10,15,.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s var(--ease-out);
}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--abyss-950);
}
.hero-bg{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) brightness(.92);
  transform: scale(1.04);
}
.hero-scrim{
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(3,10,15,.55) 0%, rgba(3,10,15,.35) 35%, rgba(3,10,15,.85) 100%),
    linear-gradient(90deg, rgba(3,10,15,.55) 0%, transparent 45%, rgba(3,10,15,.35) 100%);
}
.hero-rays{
  position: absolute; inset: 0;
  background: conic-gradient(from 200deg at 50% -10%, transparent 0deg, rgba(159,216,212,.05) 8deg, transparent 16deg);
  mix-blend-mode: screen;
  opacity: .6;
  animation: sway 14s ease-in-out infinite;
}
@keyframes sway{
  0%,100%{ transform: translateX(-2%) rotate(0deg); }
  50%{ transform: translateX(2%) rotate(1deg); }
}
.hero-content{
  position: relative;
  z-index: 10;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  width: 100%;
}
.hero-title{
  font-size: clamp(2.6rem, 6.2vw, 5.2rem);
  max-width: 14ch;
  text-shadow: 0 10px 40px rgba(0,0,0,.45);
}
.hero-title span{
  font-style: italic;
  background: linear-gradient(100deg, var(--teal-300), var(--sea-glow) 55%, var(--moss-300));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub{
  max-width: 42ch;
  font-size: 1.05rem;
  color: var(--ink-300);
}
.hero-actions{ display: flex; gap: 1rem; margin-top: 1.6rem; flex-wrap: wrap; }

.scroll-cue{
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-300);
  z-index: 2;
}
.scroll-cue span{
  width: 1px; height: 34px;
  background: linear-gradient(180deg, var(--teal-300), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-cue span::after{
  content:'';
  position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: var(--teal-300);
  animation: drip 1.8s ease-in-out infinite;
}
@keyframes drip{
  0%{ top: -100%; } 60%{ top: 100%; } 100%{ top: 100%; }
}

/* ---------- Reveal on scroll ---------- */
.reveal{
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--ease-out), transform .9s var(--ease-out);
}
.reveal.in-view{ opacity: 1; transform: translateY(0); }
.hero-content .reveal:nth-child(1){ transition-delay: .1s; }
.hero-content .reveal:nth-child(2){ transition-delay: .22s; }
.hero-content .reveal:nth-child(3){ transition-delay: .34s; }
.hero-content .reveal:nth-child(4){ transition-delay: .46s; }
.service-grid .service-card:nth-child(1){ transition-delay: 0s; }
.service-grid .service-card:nth-child(2){ transition-delay: .08s; }
.service-grid .service-card:nth-child(3){ transition-delay: .16s; }
.service-grid .service-card:nth-child(4){ transition-delay: .24s; }
.service-grid .service-card:nth-child(5){ transition-delay: .32s; }
.service-grid .service-card:nth-child(6){ transition-delay: .4s; }

/* ---------- Quote ---------- */
.quote-section{
  position: relative;
  padding: 9rem 28px;
  text-align: center;
  overflow: hidden;
}
.quote-glow{
  position: absolute;
  top: -20%; left: 50%;
  width: 900px; height: 700px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(79,154,168,.16), transparent 65%);
  pointer-events: none;
}
blockquote{
  position: relative;
  z-index: 10;
  max-width: 820px;
  margin: 0 auto;
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 500;
  color: var(--ink-100);
  line-height: 1.5;
}
blockquote cite{
  display: block;
  margin-top: 1.4rem;
  font-family: var(--font-body);
  font-style: normal;
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--teal-300);
}

/* ---------- Section heads ---------- */
.section-head{ position: relative; z-index: 10; max-width: 640px; margin: 0 auto 4rem; text-align: center; padding: 0 28px; }
.section-head h2{ font-size: clamp(2rem, 4vw, 2.9rem); }
.section-sub{ color: var(--ink-500); }

/* ---------- Services ---------- */
.services{ padding: 8rem 0 6rem; position: relative; }
.service-grid{
  position: relative;
  z-index: 10;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}
.service-card{
  background: linear-gradient(160deg, rgba(255,255,255,.045), rgba(255,255,255,.015));
  border: 1px solid rgba(255,255,255,.07);
  border-radius: 22px;
  padding: 2.4rem 2rem;
  position: relative;
  overflow: hidden;
  transition: transform .5s var(--ease-out), border-color .5s, background .5s;
}
.service-card::before{
  content:'';
  position: absolute; inset: 0;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(127,194,201,.12), transparent 60%);
  opacity: 0;
  transition: opacity .4s;
}
.service-card:hover::before{ opacity: 1; }
.service-card:hover{
  transform: translateY(-8px);
  border-color: rgba(127,194,201,.35);
  background: linear-gradient(160deg, rgba(127,194,201,.07), rgba(255,255,255,.02));
}
.card-icon{
  width: 54px; height: 54px;
  margin-bottom: 1.4rem;
  color: var(--teal-300);
}
.card-icon svg{ width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.service-card h3{ font-size: 1.35rem; margin-bottom: .5rem; }
.service-card p{ font-size: .92rem; margin-bottom: 0; }

/* ---------- About ---------- */
.about{
  position: relative;
  z-index: 10;
  max-width: var(--container);
  margin: 0 auto;
  padding: 7rem 28px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 4rem;
  align-items: center;
}
.about-frame{
  position: relative;
  aspect-ratio: 1/1;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(160deg, var(--abyss-800), var(--abyss-950));
}
.about-glow{
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(143,214,200,.25), transparent 60%);
  animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow{ 0%,100%{ opacity: .7; } 50%{ opacity: 1; } }
.about-illustration{ position: absolute; inset: 0; width: 100%; height: 100%; }
.about h2{ font-size: clamp(2rem, 3.6vw, 2.7rem); }
.stats{ display: flex; gap: 2.6rem; margin-top: 2.2rem; flex-wrap: wrap; }
.stat-num{
  display: block;
  font-family: var(--font-display);
  font-size: 2.6rem;
  color: var(--teal-300);
  font-weight: 600;
}
.stat-label{ font-size: .78rem; color: var(--ink-500); letter-spacing: .04em; }

/* ---------- Dive sites ---------- */
.sites{ padding: 6rem 0 8rem; }
.site-grid{
  position: relative;
  z-index: 10;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}
.site-card{
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.02);
  transition: transform .5s var(--ease-out), box-shadow .5s;
}
.site-card:hover{ transform: translateY(-6px); box-shadow: 0 24px 50px -20px rgba(0,0,0,.6); }
.site-visual{
  height: 210px;
  position: relative;
  overflow: hidden;
}
.site-visual::after{
  content:'';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(3,10,15,.8));
}
.site-visual--reef{ background: radial-gradient(circle at 30% 70%, var(--moss-500), var(--abyss-800) 70%); }
.site-visual--wall{ background: linear-gradient(200deg, var(--teal-500), var(--abyss-900) 65%); }
.site-visual--cave{ background: radial-gradient(circle at 70% 30%, var(--abyss-700), var(--abyss-950) 70%); }
.site-card h3{ padding: 1.4rem 1.4rem 0; font-size: 1.2rem; }
.site-card p{ padding: 0 1.4rem 1.6rem; font-size: .9rem; }

/* ---------- Contact ---------- */
.contact{ padding: 8rem 0 9rem; position: relative; }
.contact-inner{ position: relative; z-index: 10; max-width: 640px; margin: 0 auto; padding: 0 28px; text-align: center; }
.contact h2{ font-size: clamp(2rem, 4vw, 2.8rem); }
.contact-form{ margin-top: 2.4rem; display: flex; flex-direction: column; gap: 1rem; text-align: left; }
.form-row{ display: flex; gap: 1rem; }
.form-row input, .contact-form textarea{
  width: 100%;
  padding: 1em 1.2em;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
  color: var(--ink-100);
  font-family: var(--font-body);
  font-size: .92rem;
  resize: none;
  transition: border-color .3s, background .3s;
}
.form-row input:focus, .contact-form textarea:focus{
  outline: none;
  border-color: var(--teal-400);
  background: rgba(127,194,201,.06);
}
.contact-form .btn{ align-self: flex-start; border: none; }
.form-note{ margin-top: 1rem; color: var(--teal-300); font-size: .85rem; min-height: 1em; }

/* ---------- Footer ---------- */
.site-footer{ padding: 3rem 28px 2.4rem; border-top: 1px solid rgba(255,255,255,.06); }
.footer-inner{ position: relative; z-index: 10; max-width: var(--container); margin: 0 auto; text-align: center; }
.footer-brand{ justify-content: center; margin-bottom: .8rem; }
.footer-copy{ font-size: .78rem; color: var(--ink-500); margin-bottom: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .about{ grid-template-columns: 1fr; }
  .about-frame{ max-width: 380px; margin: 0 auto; }
  .service-grid{ grid-template-columns: repeat(2, 1fr); }
  .site-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .main-nav{
    position: fixed;
    inset: 0 0 auto auto;
    top: 0; right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    z-index: 70;
    background: rgba(4,14,20,.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 2.4rem;
    gap: 1.6rem;
    transform: translateX(100%);
    transition: transform .45s var(--ease-out);
    border-left: 1px solid rgba(255,255,255,.08);
  }
  .main-nav.open{ transform: translateX(0); }
  .nav-toggle{ display: flex; }
  .nav-backdrop{ display: block; }
  .nav-backdrop.visible{ opacity: 1; pointer-events: auto; }
  .nav-cta{ margin-top: .5rem; margin-left: 0; }
  .brand-logo{ height: 42px; }

  .service-grid{ grid-template-columns: 1fr; }
  .form-row{ flex-direction: column; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  html{ scroll-behavior: auto; }
}