/* ===================================
   Architectural Studio Website Styles
   Theme: Deep Slate & Warm Amber
   =================================== */

/* === CSS Variables === */
:root {
  --primary-color: #2C3E50;
  --secondary-color: #E67E22;
  --primary-dark: #1a252f;
  --primary-light: #34495e;
  --secondary-dark: #d35400;
  --secondary-light: #f39c12;
  --text-dark: #2C3E50;
  --text-light: #ffffff;
  --text-muted: #7f8c8d;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --shadow-sm: 0 2px 4px rgba(44, 62, 80, 0.1);
  --shadow-md: 0 4px 6px rgba(44, 62, 80, 0.15);
  --shadow-lg: 0 10px 30px rgba(44, 62, 80, 0.2);
  --transition-base: all 0.3s ease;
  --transition-fast: all 0.2s ease;
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-secondary: 'Playfair Display', Georgia, serif;
}

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

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

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--bg-white);
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: 1rem;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
}

a {
  text-decoration: none;
  color: var(--secondary-color);
  transition: var(--transition-fast);
}

a:hover {
  color: var(--secondary-dark);
}

/* === Bootstrap 5 Overrides === */
.container {
  max-width: 1200px;
}

.btn {
  padding: 0.75rem 2rem;
  font-weight: 600;
  border-radius: 0;
  border: none;
  transition: var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--text-light);
  border: 2px solid var(--primary-color);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--secondary-color);
  color: var(--text-light);
  border: 2px solid var(--secondary-color);
}

.btn-secondary:hover,
.btn-secondary:focus,
.btn-secondary:active {
  background-color: var(--secondary-dark);
  border-color: var(--secondary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline-primary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--text-light);
}

.btn-outline-secondary {
  background-color: transparent;
  color: var(--secondary-color);
  border: 2px solid var(--secondary-color);
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus,
.btn-outline-secondary:active {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  color: var(--text-light);
}

/* === Navigation === */
.navbar {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  transition: var(--transition-base);
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: var(--shadow-md);
}

.navbar-brand {
  font-family: var(--font-secondary);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.02em;
}

.navbar-brand:hover,
.navbar-brand:focus {
  color: var(--secondary-color);
}

.navbar-nav .nav-link {
  color: var(--primary-color);
  font-weight: 500;
  padding: 0.5rem 1rem;
  margin: 0 0.25rem;
  position: relative;
  transition: var(--transition-fast);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  transition: var(--transition-base);
  transform: translateX(-50%);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--secondary-color);
}

.navbar-nav .nav-link:hover::after {
  width: 80%;
}

.navbar-nav .nav-link.active {
  color: var(--secondary-color);
}

.navbar-nav .nav-link.active::after {
  width: 80%;
}

.navbar-toggler {
  border: none;
  padding: 0.5rem;
  background-color: transparent;
}

.navbar-toggler:focus {
  box-shadow: none;
  outline: 2px solid var(--secondary-color);
}

.navbar-toggler-icon {
  background-image: none;
  width: 25px;
  height: 2px;
  background-color: var(--primary-color);
  display: block;
  position: relative;
  transition: var(--transition-base);
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: '';
  width: 25px;
  height: 2px;
  background-color: var(--primary-color);
  position: absolute;
  left: 0;
  transition: var(--transition-base);
}

.navbar-toggler-icon::before {
  top: -8px;
}

.navbar-toggler-icon::after {
  top: 8px;
}

.navbar-toggler.active .navbar-toggler-icon {
  background-color: transparent;
}

.navbar-toggler.active .navbar-toggler-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.navbar-toggler.active .navbar-toggler-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

/* === Hero Section === */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
}

.hero-content h1 {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease-out;
}

.hero-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-content .btn {
  animation: fadeInUp 1s ease-out 0.4s backwards;
  margin: 0.5rem;
}

/* === Section Styles === */
section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title h2 {
  display: inline-block;
  position: relative;
  padding-bottom: 1rem;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--secondary-color);
}

.section-title p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 1rem auto 0;
}

/* === Cards === */
.card {
  border: none;
  border-radius: 0;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  overflow: hidden;
  height: 100%;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-img-top {
  transition: var(--transition-base);
  height: 250px;
  object-fit: cover;
}

.card:hover .card-img-top {
  transform: scale(1.05);
}

.card-body {
  padding: 2rem;
}

.card-title {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.card-text {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* === Portfolio/Projects Grid === */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-base);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(44, 62, 80, 0.95) 0%, rgba(230, 126, 34, 0.85) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-base);
  padding: 2rem;
}

.portfolio-item:hover img {
  transform: scale(1.1);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-overlay h3 {
  color: var(--text-light);
  margin-bottom: 0.5rem;
  transform: translateY(20px);
  transition: var(--transition-base);
}

.portfolio-overlay p {
  color: rgba(255, 255, 255, 0.9);
  transform: translateY(20px);
  transition: var(--transition-base) 0.1s;
}

.portfolio-item:hover .portfolio-overlay h3,
.portfolio-item:hover .portfolio-overlay p {
  transform: translateY(0);
}

/* === Services === */
.service-box {
  text-align: center;
  padding: 2rem;
  transition: var(--transition-base);
  border: 2px solid transparent;
  height: 100%;
}

.service-box:hover {
  border-color: var(--secondary-color);
  background-color: var(--bg-light);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-light);
  transition: var(--transition-base);
}

.service-box:hover .service-icon {
  transform: rotateY(360deg);
}

.service-box h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.service-box p {
  color: var(--text-muted);
}

/* === Forms === */
.form-control {
  border: 2px solid #e0e0e0;
  border-radius: 0;
  padding: 0.75rem 1rem;
  transition: var(--transition-fast);
  font-size: 1rem;
}

.form-control:focus {
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 0.2rem rgba(230, 126, 34, 0.15);
  outline: none;
}

.form-control.is-invalid {
  border-color: #dc3545;
}

.form-control.is-valid {
  border-color: #28a745;
}

.form-label {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.invalid-feedback,
.valid-feedback {
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* === Contact Section === */
.contact-info {
  background-color: var(--primary-color);
  color: var(--text-light);
  padding: 3rem;
  height: 100%;
}

.contact-info h3 {
  color: var(--text-light);
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background-color: var(--secondary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 1.5rem;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 1.5rem;
  color: var(--text-light);
}

.contact-details h4 {
  color: var(--secondary-color);
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.contact-details p {
  margin-bottom: 0;
  opacity: 0.9;
}

.contact-details a {
  color: var(--text-light);
}

.contact-details a:hover {
  color: var(--secondary-color);
}

/* === Footer === */
footer {
  background-color: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: var(--text-light);
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.footer-section p {
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 0.75rem;
}

.footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--secondary-color);
  padding-left: 5px;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: var(--transition-fast);
}

.social-link:hover {
  background-color: var(--secondary-color);
  color: var(--text-light);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.875rem;
}

.footer-bottom a {
  color: var(--secondary-color);
}

/* === Back to Top Button === */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--secondary-color);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  z-index: 1000;
  border: 2px solid var(--secondary-color);
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-5px);
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* === Loading Spinner === */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--text-light);
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* === Responsive Design === */
@media (max-width: 991px) {
  .navbar-collapse {
    background-color: var(--bg-white);
    padding: 1rem;
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
  }
  
  .navbar-nav .nav-link {
    padding: 0.75rem 1rem;
  }
  
  .navbar-nav .nav-link::after {
    left: 1rem;
    transform: translateX(0);
  }
  
  .navbar-nav .nav-link:hover::after,
  .navbar-nav .nav-link.active::after {
    width: 40px;
  }
}

@media (max-width: 768px) {
  section {
    padding: 3rem 0;
  }
  
  .hero-section {
    min-height: 80vh;
  }
  
  .section-title {
    margin-bottom: 2rem;
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  
  .contact-info {
    padding: 2rem;
    margin-bottom: 2rem;
  }
}

@media (max-width: 576px) {
  .btn {
    padding: 0.625rem 1.5rem;
    font-size: 0.8125rem;
  }
  
  .card-body {
    padding: 1.5rem;
  }
  
  .service-box {
    padding: 1.5rem;
  }
  
  .hero-content .btn {
    display: block;
    margin: 0.5rem auto;
    width: 100%;
    max-width: 250px;
  }
}

/* === Utility Classes === */
.text-primary-custom {
  color: var(--primary-color);
}

.text-secondary-custom {
  color: var(--secondary-color);
}

.bg-primary-custom {
  background-color: var(--primary-color);
}

.bg-secondary-custom {
  background-color: var(--secondary-color);
}

.bg-light-custom {
  background-color: var(--bg-light);
}

/* === Accessibility === */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--secondary-color);
  color: var(--text-light);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-to-content:focus {
  top: 0;
}

/* === Print Styles === */
@media print {
  .navbar,
  .back-to-top,
  footer {
    display: none;
  }
  
  body {
    color: #000;
  }
  
  a {
    text-decoration: underline;
  }
}