/* === Custom Properties === */
:root {
  --color-primary: #0f766e;
  --color-primary-light: #14b8a6;
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-border: #e2e8f0;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 1120px;
  --radius: 12px;
  --radius-sm: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-light);
}

/* === Layout === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

/* === Header === */
.header {
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo span {
  color: var(--color-accent);
}

/* === Language Toggle === */
.lang-toggle {
  display: flex;
  gap: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.lang-toggle button {
  background: transparent;
  color: var(--color-text-muted);
  border: none;
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.03em;
}

.lang-toggle button:not(:last-child) {
  border-right: 1px solid var(--color-border);
}

.lang-toggle button:hover {
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.05);
}

.lang-toggle button.active {
  background: var(--color-primary);
  color: #ffffff;
}

/* === Hero === */
.hero {
  padding: clamp(3rem, 8vw, 6rem) 0;
  background: linear-gradient(135deg, #0f766e 0%, #134e4a 60%, #1e1b4b 100%);
  color: #ffffff;
}

.hero-split {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
  text-align: center;
}

@media (min-width: 768px) {
  .hero-split {
    flex-direction: row;
    text-align: left;
    gap: 3rem;
  }
}

.hero-text {
  flex: 1;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
}

@media (min-width: 768px) {
  .hero-image img {
    max-width: 480px;
  }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 540px;
  margin-bottom: 2rem;
}

.btn-cta {
  display: inline-block;
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-cta:hover {
  background: var(--color-accent-hover);
  color: #ffffff;
  transform: translateY(-2px);
}

/* === Features === */
.features {
  background: var(--color-surface);
}

.features h2 {
  text-align: center;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  color: var(--color-primary);
  margin-bottom: 2.5rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card h3 {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* === How It Works === */
.how-it-works {
  text-align: center;
}

.how-it-works h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  color: var(--color-primary);
  margin-bottom: 3rem;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
  }
}

.step {
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.step h3 {
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.step p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 280px;
  margin: 0 auto;
}

/* Arrow between steps (desktop only) */
@media (min-width: 640px) {
  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 24px;
    right: -0.75rem;
    width: calc(1.5rem);
    height: 2px;
    background: var(--color-border);
  }
}

/* === CTA Section === */
.cta-section {
  background: linear-gradient(135deg, #0f766e 0%, #134e4a 100%);
  color: #ffffff;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.btn-cta-light {
  display: inline-block;
  background: #ffffff;
  color: var(--color-primary);
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-cta-light:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* === Contact Section === */
.contact-section {
  background: linear-gradient(160deg, #f0fdfa 0%, #f8fafc 50%, #eef2ff 100%);
}

.contact-section h2 {
  text-align: center;
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.contact-section .contact-intro {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-bottom: 2.5rem;
}

.contact-form {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: clamp(1.75rem, 5vw, 3rem);
  box-shadow: 0 4px 24px rgba(15, 118, 110, 0.07), 0 1px 4px rgba(0,0,0,0.04);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0 1.25rem;
}

@media (min-width: 540px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea {
  font-family: var(--font-family);
  font-size: 0.975rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  outline: none;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #94a3b8;
}

.form-group input:hover,
.form-group textarea:hover {
  border-color: #cbd5e1;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary-light);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.12);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

.form-recaptcha {
  margin-bottom: 1.5rem;
}

.form-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0.25rem 0 1.5rem;
}

.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: #ffffff;
  border: none;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
  letter-spacing: 0.01em;
}

.btn-submit:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.3);
}

.btn-submit:active:not(:disabled) {
  transform: translateY(0);
}

.btn-submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.form-status {
  display: none;
  margin-top: 1rem;
  padding: 0.8rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 600;
  text-align: center;
}

.form-status.success {
  display: block;
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-status.error {
  display: block;
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* === Footer === */
.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.6);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
}

.footer a {
  color: var(--color-primary-light);
}

.footer a:hover {
  color: #ffffff;
}

.footer p + p {
  margin-top: 0.5rem;
}