/* RVS Mühendislik — site styles */

:root {
  --ink: #0e1726;
  --navy: #13213a;
  --navy-2: #1a2b4a;
  --blue: #263a93;
  --blue-light: #4a62d1;
  --red: #d52b33;
  --steel: #5b6676;
  --steel-light: #8c96a5;
  --rule: #d9dde3;
  --paper: #f3f4f6;
  --white: #ffffff;

  --display: "Archivo", "Arial Narrow", Arial, sans-serif;
  --body: "Archivo", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
a:focus-visible,
button:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* ---------- type ---------- */

h1, h2, h3 {
  font-family: var(--display);
  font-stretch: 87.5%;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(36px, 5.6vw, 64px); font-weight: 750; }
h2 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 700; }
h3 { font-size: 21px; font-weight: 650; line-height: 1.2; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0 0 14px;
}
.lede {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--steel);
  max-width: 60ch;
  margin: 18px 0 0;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  padding: 14px 22px;
  border-radius: 2px;
  border: 2px solid transparent;
  transition: background-color .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: #b81f27; }
.btn-ghost { border-color: rgba(255,255,255,.55); color: var(--white); }
.btn-ghost:hover { background: rgba(255,255,255,.1); border-color: var(--white); }
.btn-dark { background: var(--navy); color: var(--white); }
.btn-dark:hover { background: var(--blue); }

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 50;
  background: var(--white);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--ink);
}
.brand img { height: 40px; width: auto; }
.brand-name {
  font-family: var(--display);
  font-stretch: 87.5%;
  font-weight: 700;
  font-size: 17px;
  line-height: 1.1;
  letter-spacing: .01em;
}
.brand-name small {
  display: block;
  font-family: var(--body);
  font-stretch: 100%;
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--steel);
}

.nav { display: flex; align-items: center; gap: 30px; }
.nav a {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover,
.nav a[aria-current="page"] { border-bottom-color: var(--red); }
.nav .nav-cta {
  background: var(--navy);
  color: var(--white);
  padding: 10px 16px;
  border-radius: 2px;
  border-bottom: none;
}
.nav .nav-cta:hover { background: var(--blue); }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 9px 12px;
  font: 600 14px var(--body);
  color: var(--ink);
  cursor: pointer;
}

@media (max-width: 900px) {
  .menu-toggle { display: inline-block; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--rule);
    padding: 8px var(--gutter) 18px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid var(--rule); }
  .nav .nav-cta { margin-top: 12px; text-align: center; padding: 13px 16px; }
  .brand-name small { display: none; }
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  color: var(--white);
  background: var(--ink);
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 70% 50%;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(14,23,38,.94) 0%, rgba(14,23,38,.82) 38%, rgba(14,23,38,.35) 70%, rgba(14,23,38,.15) 100%);
}
.hero .wrap {
  position: relative;
  padding-block: clamp(72px, 11vw, 140px) clamp(40px, 6vw, 64px);
}
.hero-copy { max-width: 640px; }
.hero .eyebrow { color: #ff8a8f; }
.hero h1 { color: var(--white); }
.hero .lede { color: #c9d0db; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 36px;
  margin-top: clamp(48px, 8vw, 96px);
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.18);
  font-family: var(--mono);
  font-size: 13px;
  color: #aeb7c4;
}
.hero-facts b { color: var(--white); font-weight: 500; }

@media (max-width: 700px) {
  .hero-media::after {
    background: linear-gradient(180deg, rgba(14,23,38,.70) 0%, rgba(14,23,38,.92) 60%);
  }
}

/* ---------- clients ---------- */

.clients {
  border-bottom: 1px solid var(--rule);
  padding-block: 26px;
}
.clients .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 34px;
}
.clients-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel-light);
}
.clients ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.clients li {
  font-family: var(--display);
  font-stretch: 87.5%;
  font-weight: 650;
  font-size: 17px;
  color: var(--steel);
  letter-spacing: .01em;
}

/* ---------- sections ---------- */

.section { padding-block: clamp(64px, 9vw, 112px); }
.section-head { max-width: 720px; margin-bottom: clamp(36px, 5vw, 56px); }
.section-dark { background: var(--navy); color: var(--white); }
.section-dark .lede { color: #b7c0cd; }
.section-dark .eyebrow { color: #ff8a8f; }
.section-paper { background: var(--paper); }

/* ---------- services ---------- */

.services {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.service {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, transform .15s;
}
.service:hover { border-color: var(--blue); }
.service img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.service-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 24px 24px 26px;
}
.service p {
  color: var(--steel);
  font-size: 15.5px;
  margin: 10px 0 18px;
}
.service .more {
  margin-top: auto;
  font-weight: 600;
  font-size: 15px;
  color: var(--blue);
}

@media (max-width: 900px) {
  .services { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- steel expertise ---------- */

.steel {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: center;
}
.steel p { color: #c3cbd7; max-width: 54ch; }
.figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255,255,255,.14);
  border: 1px solid rgba(255,255,255,.14);
}
.figure {
  background: var(--navy);
  padding: 26px 24px;
}
.figure .num {
  font-family: var(--display);
  font-stretch: 87.5%;
  font-weight: 750;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.figure .num span {
  font-size: .5em;
  font-weight: 600;
  color: #ff8a8f;
  margin-left: 4px;
}
.figure .what {
  font-size: 14.5px;
  color: #c3cbd7;
  margin-top: 10px;
}
.figure .where {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--steel-light);
  margin-top: 6px;
}

@media (max-width: 900px) {
  .steel { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .figures { grid-template-columns: 1fr; }
}

/* ---------- projects ---------- */

.projects {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.project {
  text-decoration: none;
  color: inherit;
  display: block;
}
.project-img {
  overflow: hidden;
  background: var(--paper);
}
.project-img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform .4s;
}
.project:hover .project-img img { transform: scale(1.03); }
@media (prefers-reduced-motion: reduce) {
  .project-img img { transition: none; }
  .project:hover .project-img img { transform: none; }
}
.project-meta {
  padding-top: 16px;
  border-top: 3px solid var(--ink);
  margin-top: 0;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 8px;
}
.project h3 { font-size: 19px; }
.project .spec {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--steel);
  margin-top: 8px;
  line-height: 1.5;
}
.section-foot { margin-top: 44px; }

@media (max-width: 900px) {
  .projects { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .projects { grid-template-columns: 1fr; }
}

/* ---------- process ---------- */

.process {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule);
}
.process li {
  counter-increment: step;
  padding: 24px 20px 8px 0;
  border-right: 1px solid var(--rule);
  margin-right: 20px;
}
.process li:last-child { border-right: none; margin-right: 0; }
.process li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--red);
  margin-bottom: 14px;
}
.process h3 { font-size: 18px; }
.process p { font-size: 14.5px; color: var(--steel); margin: 8px 0 0; }

@media (max-width: 900px) {
  .process { grid-template-columns: 1fr; }
  .process li {
    border-right: none;
    margin-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 20px 0;
    display: grid;
    grid-template-columns: 48px 1fr;
    column-gap: 8px;
  }
  .process li::before { margin: 2px 0 0; grid-row: span 2; }
}

/* ---------- about / norms ---------- */

.about {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}
.about p { color: var(--steel); max-width: 60ch; }
.norms {
  border: 1px solid var(--rule);
  background: var(--white);
}
.norms-head {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel);
  padding: 16px 22px;
  border-bottom: 1px solid var(--rule);
}
.norm {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--rule);
}
.norm:last-child { border-bottom: none; }
.norm b {
  font-family: var(--display);
  font-stretch: 87.5%;
  font-weight: 700;
  font-size: 20px;
}
.norm span { font-size: 14px; color: var(--steel); text-align: right; }

@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; }
}

/* ---------- contact ---------- */

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
}
.contact-intro p { color: #b7c0cd; }
.office {
  border-top: 3px solid var(--red);
  padding-top: 18px;
}
.office h3 { font-size: 18px; color: var(--white); }
.office address {
  font-style: normal;
  color: #c3cbd7;
  font-size: 15px;
  margin: 10px 0 14px;
}
.office a {
  display: block;
  color: var(--white);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 14px;
  padding: 3px 0;
}
.office a:hover { color: #ff8a8f; }

@media (max-width: 900px) {
  .contact { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink);
  color: var(--steel-light);
  font-size: 14px;
  padding-block: 34px;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px 32px;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.site-footer a { color: #c3cbd7; text-decoration: none; }
.site-footer a:hover { color: var(--white); }

/* ---------- preview banner ---------- */

.preview-note {
  background: #fff4d6;
  color: #6a4b00;
  font-size: 13.5px;
  text-align: center;
  padding: 8px var(--gutter);
  border-bottom: 1px solid #f0d98c;
}
/* hero drone video */
.hero-media .hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .9s ease; }
.hero-media .hero-video.on { opacity: 1; }
.hero-vtoggle { position: absolute; right: 16px; bottom: 16px; z-index: 3; width: 40px; height: 40px; border: 1px solid rgba(255,255,255,.35); border-radius: 50%; background: rgba(14,23,38,.55); color: #fff; font-size: 13px; line-height: 1; cursor: pointer; }
.hero-vtoggle:hover { background: rgba(14,23,38,.8); }
.hero-vtoggle:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

/* client logo marquee */
.logos { padding-block: clamp(56px, 7vw, 88px) clamp(40px, 5vw, 56px); background: var(--white); border-top: 1px solid var(--rule); }
.logos-head { text-align: center; margin-bottom: clamp(28px, 4vw, 44px); }
.logos-head h2 { font-size: clamp(24px, 2.8vw, 34px); max-width: 26ch; margin: 10px auto 0; }
.logo-marquee { position: relative; display: flex; overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.logo-track { display: flex; align-items: center; gap: 64px; margin: 0; padding: 10px 64px 10px 0; list-style: none; flex: none; animation: logo-scroll 60s linear infinite; }
.logo-track li { flex: none; }
.logo-track img { display: block; height: 56px; width: auto; max-width: 170px; object-fit: contain; filter: grayscale(1); opacity: .7; transition: opacity .2s, filter .2s; }
.logo-track li:hover img { opacity: 1; filter: none; }
.logo-marquee:hover .logo-track, .logo-marquee.paused .logo-track { animation-play-state: paused; }
@keyframes logo-scroll { to { transform: translateX(-100%); } }
.logo-ctrl { display: flex; justify-content: center; margin-top: 18px; }
.logo-toggle { width: 34px; height: 34px; border: 1px solid var(--rule); border-radius: 50%; background: var(--white); color: var(--steel); font-size: 11px; line-height: 1; cursor: pointer; }
.logo-toggle:hover { border-color: var(--blue); color: var(--blue); }
.logo-toggle:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
@media (max-width: 700px) { .logo-track { gap: 40px; padding-right: 40px; animation-duration: 45s; } .logo-track img { height: 44px; max-width: 130px; } }