/* ============================================
   OSS Business Solutions Oy
   Minimalist, professional website
   ============================================ */

:root {
  --brand-blue: #0088cc;
  --brand-blue-hover: #006da3;
  --dark: #2c2a2a;
  --dark-light: #4a4747;
  --white: #ffffff;
  --off-white: #f2f4f7;
  --gray-light: #e8eaed;
  --gray-mid: #9aa0a8;
  --max-width: 1120px;
  --nav-height: 72px;
  --section-padding: 100px;
  --transition: 0.3s ease;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--brand-blue);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--brand-blue-hover);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Typography ---- */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

p {
  color: var(--dark-light);
  font-size: 1.05rem;
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: var(--white);
  box-shadow: 0 1px 0 var(--gray-light);
  display: flex;
  align-items: center;
}

.nav .container {
  display: flex;
  align-items: center;
  width: 100%;
}

.nav-logo {
  flex-shrink: 0;
}

.nav-logo img {
  height: 48px;
  width: auto;
}

.nav-menu {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--dark);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-blue);
  transition: width var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--brand-blue);
}

/* Language Dropdown */
.lang-dropdown {
  position: relative;
  flex-shrink: 0;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
}

.lang-toggle:hover {
  opacity: 0.7;
}

.lang-flag {
  font-size: 1.2rem;
  line-height: 1;
}

.lang-chevron {
  stroke: var(--gray-mid);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--transition);
}

.lang-dropdown.open .lang-chevron {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  list-style: none;
  min-width: 160px;
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s ease;
  z-index: 100;
}

.lang-dropdown.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 12px;
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--dark);
  transition: background var(--transition);
}

.lang-option span {
  font-size: 1.2rem;
}

.lang-option:hover {
  background: var(--off-white);
}

.lang-option.active {
  color: var(--brand-blue);
  background: rgba(0, 136, 204, 0.06);
}

/* Mobile Menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  transition: all var(--transition);
  border-radius: 2px;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---- Hero ---- */
.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  margin-top: var(--nav-height);
  background-color: var(--dark);
  position: relative;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center center;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.hero-bg.active {
  opacity: 1;
}

/* Hero responsive images — mobile first */
.hero-bg-1 { background-image: url('images/hero-bg-1-480w.webp'); }
.hero-bg-2 { background-image: url('images/hero-bg-2-480w.webp'); }
.hero-bg-3 { background-image: url('images/hero-bg-3-480w.webp'); }
.hero-bg-4 { background-image: url('images/hero-bg-4-480w.webp'); }
.hero-bg-5 { background-image: url('images/hero-bg-5-480w.webp'); }

@media (min-width: 481px) {
  .hero-bg-1 { background-image: url('images/hero-bg-1-1024w.webp'); }
  .hero-bg-2 { background-image: url('images/hero-bg-2-1024w.webp'); }
  .hero-bg-3 { background-image: url('images/hero-bg-3-1024w.webp'); }
  .hero-bg-4 { background-image: url('images/hero-bg-4-1024w.webp'); }
  .hero-bg-5 { background-image: url('images/hero-bg-5-1024w.webp'); }
}

@media (min-width: 1025px) {
  .hero-bg-1 { background-image: url('images/hero-bg-1.webp'); }
  .hero-bg-2 { background-image: url('images/hero-bg-2.webp'); }
  .hero-bg-3 { background-image: url('images/hero-bg-3.webp'); }
  .hero-bg-4 { background-image: url('images/hero-bg-4.webp'); }
  .hero-bg-5 { background-image: url('images/hero-bg-5.webp'); }
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  z-index: 1;
}

.hero .container {
  max-width: 800px;
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin-bottom: 24px;
  color: var(--white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.hero p {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 600px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.3);
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--brand-blue);
  color: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.btn:hover {
  background: var(--brand-blue-hover);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 136, 204, 0.25);
}

/* ---- Sections ---- */
.section {
  padding: var(--section-padding) 0;
}

.section-alt {
  background: var(--off-white);
}

.section-header {
  margin-bottom: 60px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  max-width: 560px;
  font-size: 1.1rem;
}

#references .section-header p {
  max-width: 800px;
}

/* ---- Services ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  padding: 36px 32px;
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray-light);
  transition: all var(--transition);
  text-align: center;
}

.section-alt .service-card {
  background: var(--white);
}


.service-icon {
  width: 72px;
  height: 72px;
  background: rgba(0, 136, 204, 0.08);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.service-icon svg {
  width: 36px;
  height: 36px;
  stroke: var(--brand-blue);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-icon svg .icon-fill {
  fill: rgba(0, 136, 204, 0.12);
  stroke: none;
}

.service-icon svg .icon-accent {
  fill: var(--brand-blue);
  stroke: none;
}

.service-card h3 {
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- Approach ---- */
.section-dark {
  background: var(--dark);
}

.section-dark h2,
.section-dark h3 {
  color: var(--white);
}

.section-dark p {
  color: #b8b5b5;
}

.section-dark .value-icon {
  background: rgba(0, 136, 204, 0.15);
}

.approach-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.approach-text p {
  margin-bottom: 20px;
}

.approach-text p:last-child {
  margin-bottom: 0;
}

.approach-values {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.value-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.value-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(0, 136, 204, 0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.value-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--brand-blue);
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.value-item h3 {
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.value-item p {
  font-size: 0.92rem;
}

/* ---- Team ---- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray-light);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}


.team-avatar {
  width: 96px;
  height: 96px;
  background: rgba(0, 136, 204, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.team-avatar svg {
  width: 48px;
  height: 48px;
  stroke: var(--brand-blue);
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.team-card h3 {
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.team-role {
  color: var(--gray-mid);
  font-size: 0.9rem !important;
  margin-bottom: 4px;
}

.team-location {
  color: var(--gray-mid);
  font-size: 0.85rem !important;
}

.team-contact {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.team-contact a {
  font-size: 0.88rem;
  color: var(--brand-blue);
}

/* ---- References ---- */
.references-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.reference-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 24px 28px;
  text-align: center;
  background: var(--off-white);
  border-radius: 10px;
  transition: all var(--transition);
  text-decoration: none;
  border: 1px solid transparent;
}

.reference-card:hover {
  background: var(--white);
  border-color: var(--gray-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
  color: inherit;
}

.reference-logo {
  height: 60px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  margin-bottom: 16px;
  filter: none;
  opacity: 1;
  transition: all var(--transition);
}

.reference-logo-lg {
  height: 80px;
  max-width: 260px;
}

.reference-card span {
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  margin-bottom: 8px;
}

.reference-card p {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--gray-mid);
}

/* ---- Contact Modal ---- */
body.modal-open {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background: var(--white);
  border-radius: 12px;
  padding: 40px 36px;
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  position: relative;
  transform: scale(0.95) translateY(12px);
  transition: transform 0.25s ease;
}

.modal-overlay.open .modal-dialog {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: background var(--transition);
}

.modal-close svg {
  stroke: var(--gray-mid);
  stroke-width: 2;
  stroke-linecap: round;
}

.modal-close:hover {
  background: var(--off-white);
}

.modal-close:hover svg {
  stroke: var(--dark);
}

.modal-title {
  font-size: 1.4rem;
  margin-bottom: 28px;
}

/* ---- Contact Form ---- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--dark);
}

.form-optional {
  font-weight: 400;
  color: var(--gray-mid);
  font-size: 0.85rem;
}

.form-group input,
.form-group textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 16px;
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  background: var(--white);
  color: var(--dark);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  overflow: hidden;
}

.form-submit {
  align-self: flex-start;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  font-size: 0.9rem;
  min-height: 1.4em;
}

.form-status-success {
  color: #16a34a;
}

.form-status-error {
  color: #dc2626;
}

/* ---- Contact ---- */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact-intro p {
  margin-bottom: 32px;
  font-size: 1.1rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(0, 136, 204, 0.08);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--brand-blue);
  fill: none;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-item h3 {
  margin-bottom: 4px;
  font-size: 1rem;
}

.contact-item p {
  font-size: 0.95rem;
}

.contact-item a {
  color: var(--brand-blue);
}

.contact-map {
  margin-top: 48px;
}

.contact-map iframe {
  width: 100%;
  display: block;
}

/* ---- Footer ---- */
.footer {
  padding: 32px 0;
  background: var(--dark);
  border-top: 1px solid #3a3838;
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer p {
  font-size: 0.85rem;
  color: #7a7676;
}

.footer-logo img {
  height: 36px;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.footer-logo:hover img {
  opacity: 1;
}

/* ---- Scroll Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
    --nav-height: 64px;
  }

  .nav-logo img {
    height: 36px;
  }

  .nav-toggle {
    display: flex;
    order: 10;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-links {
    flex-direction: column;
    gap: 24px;
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .lang-dropdown {
    margin-left: auto;
    margin-right: 8px;
  }

  .hero {
    min-height: auto;
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .team-avatar {
    width: 80px;
    height: 80px;
  }

  .team-avatar svg {
    width: 40px;
    height: 40px;
  }

  .team-contact a {
    word-break: break-all;
  }

  .service-card {
    padding: 28px 24px;
  }

  .approach-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .references-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .reference-logo {
    height: 48px;
    max-width: 140px;
  }

  .reference-logo-lg {
    height: 60px;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-item h3 {
    font-size: 0.9rem;
  }

  .footer .container {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .footer-logo img {
    margin: 0 auto;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .modal-overlay {
    padding: 0;
  }

  .modal-dialog {
    max-width: 100%;
    max-height: 100vh;
    border-radius: 0;
    padding: 32px 20px;
  }

  .modal-dialog .form-submit {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --section-padding: 48px;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 36px 0;
  }

  .references-grid {
    grid-template-columns: 1fr;
  }

  .reference-card {
    padding: 24px 16px 20px;
  }

  .value-item {
    flex-direction: column;
    text-align: center;
  }
}