/* THINK2SELL - Strategy Studio in Neuroscience */
/* Variables */
:root {
  --color-primary: #2D68C4;
  --color-primary-dark: #1E4482;
  --color-primary-light: #6C98DE;
  --color-secondary: #C3302B;
  --color-secondary-dark: #8A2220;
  --color-accent: #0047AB;
  --color-navy: #1a2332;
  --color-navy-light: #2a3547;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --font-family-base: 'Montserrat', sans-serif;
  --spacing-section: 5rem;
  --spacing-container: 1.5rem;
  --radius-button: 0.5rem;
  --radius-card: 1rem;
  --shadow-card: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-card-hover: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy);
}

/* Layout */
.container-custom {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-container);
  padding-right: var(--spacing-container);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--color-secondary);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-button);
  text-decoration: none;
  transition: all 0.3s;
}
.btn-primary:hover {
  background: var(--color-secondary-dark);
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.btn-secondary {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--color-accent);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-button);
  border: none;
  cursor: pointer;
  font-family: var(--font-family-base);
  font-size: 1rem;
  transition: all 0.3s;
}
.btn-secondary:hover {
  opacity: 0.9;
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}
.btn-full {
  width: 100%;
}

.text-primary { color: var(--color-primary); }

/* Header */
.header {
  background: white;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.1);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-inner { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.nav-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo-img {
  height: 4.5rem;
  width: auto;
  display: block;
}
.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  color: var(--color-gray-700);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-primary); }
.nav-cta .btn-primary {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

/* Hero */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
}
.hero-content {
  position: relative;
  z-index: 10;
  padding-top: 5rem;
  padding-bottom: 5rem;
}
.hero-text { max-width: 42rem; }
.hero h1 {
  font-size: 2.25rem;
  color: white;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.hero p {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.9);
  font-weight: 500;
  margin-bottom: 2rem;
}
@media (min-width: 768px) {
  .hero { min-height: 700px; }
  .hero h1 { font-size: 3rem; }
  .hero p { font-size: 1.5rem; }
}
@media (min-width: 1024px) {
  .hero h1 { font-size: 3.75rem; }
}

/* Features */
.features {
  padding-top: 4rem;
  padding-bottom: 4rem;
  background: white;
}
.features-title {
  font-size: 1.875rem;
  text-align: center;
  margin-bottom: 3rem;
}
@media (min-width: 768px) {
  .features { padding-top: 5rem; padding-bottom: 5rem; }
  .features-title { font-size: 2.25rem; }
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}
.feature-card {
  background: white;
  padding: 2rem;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-gray-200);
  text-align: center;
  transition: all 0.3s;
}
.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
}
.feature-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-gray-100);
  color: var(--color-primary);
  transition: background 0.3s;
}
.feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.feature-card:hover .feature-icon {
  background: rgba(45, 104, 196, 0.1);
}
.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--color-navy);
}
.feature-card p {
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* Contact */
.contact {
  padding-top: 4rem;
  padding-bottom: 4rem;
  background: var(--color-gray-100);
}
.contact-title {
  font-size: 1.875rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--color-navy);
}
@media (min-width: 768px) {
  .contact { padding-top: 5rem; padding-bottom: 5rem; }
  .contact-title { font-size: 2.25rem; }
}
.form-wrapper {
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
  background: white;
  padding: 2rem;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover);
}
@media (min-width: 768px) {
  .form-wrapper { padding: 3rem; }
}
.contact-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.contact-form .form-row input {
  margin-bottom: 1rem;
}
@media (max-width: 767px) {
  .contact-form .form-row { grid-template-columns: 1fr; }
}
.form-group { margin-bottom: 1.5rem; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-button);
  font-family: var(--font-family-base);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(45, 104, 196, 0.2);
}
.contact-form textarea {
  resize: none;
}
.form-privacy {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-gray-600);
  margin-top: 0.5rem;
}

/* Gallery */
.gallery {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  background: white;
}
.gallery-title {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--color-navy);
}
.gallery-description {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--color-gray-600);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 480px) {
  .gallery {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
  .gallery-title {
    font-size: 1.875rem;
    margin-bottom: 2rem;
  }
}
@media (min-width: 768px) {
  .gallery { 
    padding-top: 5rem; 
    padding-bottom: 5rem; 
  }
  .gallery-title { font-size: 2.25rem; }
}
.filter-buttons {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--color-primary);
  background: white;
  color: var(--color-primary);
  font-weight: 600;
  border-radius: var(--radius-button);
  cursor: pointer;
  transition: all 0.3s;
  font-family: var(--font-family-base);
  font-size: 0.85rem;
}
.filter-btn:hover {
  background: var(--color-primary);
  color: white;
}
.filter-btn.active {
  background: var(--color-primary);
  color: white;
}
@media (min-width: 480px) {
  .filter-btn {
    padding: 0.625rem 1.5rem;
    font-size: 0.95rem;
  }
  .filter-buttons {
    gap: 1rem;
    margin-bottom: 3rem;
  }
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1.5rem;
}
@media (min-width: 480px) {
  .gallery-grid { 
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem; 
  }
}
@media (min-width: 768px) {
  .gallery-grid { 
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all 0.3s;
  opacity: 1;
  aspect-ratio: 1;
}
@media (min-width: 480px) {
  .gallery-item { height: 320px; }
}
@media (min-width: 768px) {
  .gallery-item { height: 350px; }
}
.gallery-item.hidden {
  display: none;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.gallery-item:hover img {
  transform: scale(1.05);
}