/* ==========================================
   EBTA DESIGN SYSTEM & STYLESHEET
   Brutalist Technical Aesthetic
   ========================================== */

/* Design Tokens */
:root {
  /* Colors */
  --color-primary: #000000;
  --color-on-primary: #ffffff;
  --color-surface: #f9f9f9;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f3f3f4;
  --color-surface-container: #eeeeee;
  --color-surface-container-high: #e8e8e8;
  --color-surface-container-highest: #e2e2e2;
  --color-surface-dim: #dadada;
  --color-surface-variant: #e2e2e2;
  --color-secondary-container: #39ff14; /* Safety Neon Green */
  --color-on-secondary-container: #000000;
  --color-on-surface: #1a1c1c;
  --color-on-surface-variant: #4c4546;
  --color-outline: #7e7576;
  --color-outline-variant: #cfc4c5;

  /* Fonts */
  --font-display: 'Space Grotesk', sans-serif;
  --font-technical: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --unit: 4px;
  --spacing-stack-sm: 8px;
  --spacing-gutter: 16px;
  --spacing-stack-md: 24px;
  --spacing-stack-lg: 48px;
  --margin-mobile: 16px;
  --margin-desktop: 40px;
}

/* 1. Global Reset & Brutalist Rule */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important; /* Strict Brutalist: 0px border-radius */
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-surface-container-lowest);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: flex-col;
  display: -webkit-box;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* 2. Brutalist Utility Classes */
.brutalist-border {
  border: 1px solid var(--color-primary);
}
.brutalist-border-t {
  border-top: 1px solid var(--color-primary);
}
.brutalist-border-b {
  border-bottom: 1px solid var(--color-primary);
}
.brutalist-border-l {
  border-left: 1px solid var(--color-primary);
}
.brutalist-border-r {
  border-right: 1px solid var(--color-primary);
}

/* 3. Header / Top App Bar */
.top-app-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  background-color: var(--color-surface-container-lowest);
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px var(--margin-mobile);
}

@media (min-width: 768px) {
  .top-app-bar {
    padding: 16px var(--margin-desktop);
  }
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--color-primary);
  line-height: 1;
}

.btn-nav-contact {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: 10px 18px;
  border: 1px solid var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-nav-contact:hover {
  background-color: var(--color-secondary-container);
  color: var(--color-primary);
}

/* 4. Main Layout & Hero Section */
main {
  flex-grow: 1;
}

.hero-section {
  padding: var(--spacing-stack-lg) var(--margin-mobile);
  border-bottom: 1px solid var(--color-primary);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-gutter);
  position: relative;
}

@media (min-width: 1024px) {
  .hero-section {
    padding: var(--spacing-stack-lg) var(--margin-desktop);
    grid-template-columns: 1fr 1fr;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--spacing-stack-md);
  background-color: rgba(255, 255, 255, 0.9);
  padding: 16px;
  border: 1px solid var(--color-primary);
}

@media (min-width: 768px) {
  .hero-content {
    background-color: transparent;
    border: none;
    padding: 0;
  }
}

.hero-title {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  word-break: break-word;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 56px;
  }
}

.hero-description {
  font-family: var(--font-technical);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-on-surface-variant);
  max-width: 580px;
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-primary);
  padding: 16px;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: var(--color-secondary-container);
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  padding: 16px 24px;
  border: 1px solid var(--color-primary);
  text-decoration: none;
  width: fit-content;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-cta-primary:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

.hero-visual {
  position: relative;
  min-height: 380px;
  border: 1px solid var(--color-primary);
  background-color: var(--color-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: filter 0.5s ease, opacity 0.5s ease;
}

.hero-visual:hover .hero-image {
  filter: grayscale(0%);
  opacity: 0.85;
}

.hero-overlay-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.15;
  background: radial-gradient(var(--color-primary) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}

.hero-icon {
  font-size: 64px;
  color: var(--color-primary);
  position: relative;
  z-index: 10;
  opacity: 0.3;
}

/* 5. The Model Section */
.model-section {
  padding: var(--spacing-stack-lg) var(--margin-mobile);
  border-bottom: 1px solid var(--color-primary);
  background-color: var(--color-surface-container-low);
}

@media (min-width: 768px) {
  .model-section {
    padding: var(--spacing-stack-lg) var(--margin-desktop);
  }
}

.section-header {
  margin-bottom: var(--spacing-stack-md);
  border-bottom: 1px solid var(--color-primary);
  padding-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.section-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 40px;
    letter-spacing: -0.02em;
  }
}

.section-tag {
  font-family: var(--font-technical);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-outline);
}

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--color-primary);
}

@media (min-width: 768px) {
  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card-item {
  padding: var(--spacing-stack-md);
  background-color: var(--color-surface-container-lowest);
  border-bottom: 1px solid var(--color-primary);
  transition: background-color 0.2s ease;
}

@media (min-width: 768px) {
  .card-item {
    border-bottom: none;
    border-right: 1px solid var(--color-primary);
  }
  .card-item:last-child {
    border-right: none;
  }
}

.card-item:hover {
  background-color: var(--color-surface-dim);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-icon {
  font-size: 36px;
  color: var(--color-primary);
  transition: color 0.2s ease;
}

.card-item:hover .card-icon {
  color: var(--color-primary);
}

.card-num {
  font-family: var(--font-technical);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-outline);
}

.card-title {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.card-desc {
  font-family: var(--font-technical);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-on-surface-variant);
}

/* 6. Graduate Profile Section */
.profile-section {
  padding: var(--spacing-stack-lg) var(--margin-mobile);
  border-bottom: 1px solid var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
}

@media (min-width: 768px) {
  .profile-section {
    padding: var(--spacing-stack-lg) var(--margin-desktop);
  }
}

.profile-card {
  max-width: 960px;
  margin: 0 auto;
  border: 1px solid var(--color-on-primary);
  padding: var(--spacing-stack-md);
  position: relative;
  overflow: hidden;
}

.profile-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--font-technical);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-secondary-container);
}

.profile-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--color-on-primary);

}

@media (min-width: 768px) {
  .profile-title {
    font-size: 52px;
  }
}

.profile-highlight {
  color: var(--color-secondary-container);
}

/* 7. Lead Capture Section */
.lead-section {
  padding: var(--spacing-stack-lg) var(--margin-mobile);
  background-color: var(--color-surface-container-lowest);
}

@media (min-width: 768px) {
  .lead-section {
    padding: var(--spacing-stack-lg) var(--margin-desktop);
  }
}

.lead-container {
  max-width: 768px;
  margin: 0 auto;
  border: 1px solid var(--color-primary);
}

.lead-header {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: 16px;
  border-bottom: 1px solid var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.lead-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .lead-title {
    font-size: 32px;
  }
}

.lead-body {
  padding: var(--spacing-stack-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-stack-md);
}

.whatsapp-box {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  background-color: var(--color-secondary-container);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 24px;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  gap: 16px;
}

@media (min-width: 640px) {
  .whatsapp-box {
    flex-direction: row;
    align-items: center;
  }
}

.whatsapp-box:hover {
  background-color: var(--color-primary);
  color: var(--color-secondary-container);
}

.whatsapp-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.whatsapp-title {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.whatsapp-subtitle {
  font-family: var(--font-technical);
  font-size: 14px;
  font-weight: 500;
}

.whatsapp-badge {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  border: 1px solid currentColor;
  padding: 8px 16px;
}

.divider-box {
  display: flex;
  align-items: center;
  gap: 16px;
}

.divider-line {
  flex-grow: 1;
  border-top: 1px solid var(--color-primary);
}

.divider-text {
  font-family: var(--font-technical);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-outline);
  text-transform: uppercase;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.form-label {
  font-family: var(--font-technical);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.form-input {
  background-color: var(--color-surface-container-lowest);
  border: 1px solid var(--color-primary);
  padding: 12px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-primary);
  transition: border-bottom-width 0.15s ease, background-color 0.15s ease;
}

.form-input:focus {
  outline: none;
  border-bottom-width: 4px;
  background-color: var(--color-surface-dim);
}

.btn-submit {
  margin-top: 16px;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 16px;
  border: 1px solid var(--color-primary);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn-submit:hover {
  background-color: var(--color-secondary-container);
  color: var(--color-primary);
}

.btn-submit:active {
  transform: translateY(2px);
}

/* 8. Footer */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-technical);
  font-size: 13px;
  width: 100%;
  margin-top: var(--spacing-stack-lg);
  border-top: 1px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-stack-md) var(--margin-mobile);
  gap: 16px;
}

@media (min-width: 768px) {
  .site-footer {
    flex-direction: row;
    padding: var(--spacing-stack-md) var(--margin-desktop);
  }
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.footer-link {
  color: var(--color-on-primary);
  opacity: 0.8;
  text-decoration: none;
  text-transform: uppercase;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.footer-link:hover {
  opacity: 1;
  color: var(--color-secondary-container);
}

.footer-copy {
  opacity: 0.5;
  font-size: 12px;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-copy {
    text-align: right;
  }
}