/* 
   DOÇ. DR. EMRE BAL - LUXURY DESIGN SYSTEM
   Theme: Obsidian & Alabaster with Muted Gold and Surgical Blue (Dark Mode)
*/

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
  /* Color Palette (HSL Tailored) */
  --color-obsidian: hsl(220, 15%, 8%);      /* Deep dark slate-black */
  --color-alabaster: hsl(40, 20%, 96%);     /* Soft warm white */
  --color-charcoal: hsl(220, 10%, 15%);     /* Secondary dark container */
  --color-bronze: hsl(38, 30%, 65%);        /* Warm platinum-bronze / Gold accent */
  --color-bronze-dim: hsl(38, 20%, 45%);    /* Secondary bronze */
  --color-surgical: hsl(190, 45%, 48%);     /* Titanium medical blue */
  --color-surgical-dim: hsl(190, 30%, 25%); /* Surgical light shadow */
  --color-gray-dark: hsl(220, 8%, 30%);     /* Muted gray for lines */
  --color-gray-light: hsl(220, 8%, 70%);    /* Readable gray for descriptions */

  /* Typography */
  --font-serif: 'Cormorant Garamond', serif;
  --font-sans: 'Inter', sans-serif;

  /* Layout Constants */
  --container-width: 1200px;
  --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-elastic: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--color-obsidian);
  color: var(--color-alabaster);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
}

/* Custom Premium Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-obsidian);
}
::-webkit-scrollbar-thumb {
  background: var(--color-charcoal);
  border: 2px solid var(--color-obsidian);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-bronze);
}

/* Layout Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  position: relative;
}

/* Header & Navigation Styling */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(8, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition-smooth);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 90px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.logo {
  text-decoration: none;
  color: var(--color-alabaster);
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 1px;
}

.logo-sub {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-top: -2px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 3rem;
}

nav a {
  text-decoration: none;
  color: var(--color-alabaster);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
  padding: 0.5rem 0;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-bronze);
  transition: var(--transition-smooth);
}

nav a:hover {
  color: var(--color-bronze);
}

nav a:hover::after,
nav li.active a::after {
  width: 100%;
}

.nav-cta {
  border: 1px solid var(--color-bronze);
  padding: 0.6rem 1.4rem;
  border-radius: 2px;
  transition: var(--transition-smooth);
}

.nav-cta:hover {
  background: var(--color-bronze);
  color: var(--color-obsidian) !important;
}

.nav-cta::after {
  display: none;
}

/* Typography Base Styles */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
}

.section-title-wrap {
  margin-bottom: 5rem;
}

.section-subtitle {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--color-bronze);
  display: block;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 3.5rem;
  line-height: 1.1;
  font-weight: 300;
}

.lead-text {
  font-size: 1.1rem;
  color: var(--color-gray-light);
  max-width: 600px;
  margin-top: 1.5rem;
  font-weight: 300;
}

/* Base Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.1rem 2.4rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: var(--transition-smooth);
}

.btn-primary {
  border: 1px solid var(--color-bronze);
  color: var(--color-alabaster);
  background: transparent;
}

.btn-primary::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: var(--color-bronze);
  z-index: -1;
  transition: var(--transition-smooth);
}

.btn-primary:hover {
  color: var(--color-obsidian);
}

.btn-primary:hover::before {
  height: 100%;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-alabaster);
  background: transparent;
  margin-left: 1.5rem;
}

.btn-secondary:hover {
  border-color: var(--color-alabaster);
  background: rgba(255, 255, 255, 0.05);
}

/* Asymmetric Grid Layouts */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* Glassmorphism Cards */
.glass-card {
  background: rgba(25, 27, 31, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 4px;
  padding: 3rem;
  transition: var(--transition-smooth);
}

.glass-card:hover {
  border-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Form Styles & Glowing Inputs */
.form-group {
  margin-bottom: 2rem;
  position: relative;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-bronze);
  margin-bottom: 0.8rem;
}

.form-control {
  width: 100%;
  background: rgba(8, 9, 11, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-alabaster);
  padding: 1.1rem 1.4rem;
  font-size: 0.95rem;
  border-radius: 2px;
  font-family: var(--font-sans);
  transition: var(--transition-smooth);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-surgical);
  box-shadow: 0 0 15px rgba(38, 172, 190, 0.15);
  background: rgba(8, 9, 11, 0.8);
}

/* KVKK Checkbox & Portal specific classes */
.checkbox-container {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.85rem;
  color: var(--color-gray-light);
}

.checkbox-container input {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-smooth);
}

.checkbox-container:hover .checkmark {
  border-color: var(--color-bronze);
}

.checkbox-container input:checked + .checkmark {
  border-color: var(--color-surgical);
  background-color: var(--color-surgical-dim);
}

.checkmark::after {
  content: '✓';
  color: var(--color-surgical);
  font-size: 0.8rem;
  font-weight: bold;
  display: none;
}

.checkbox-container input:checked + .checkmark::after {
  display: block;
}

/* Modal styling for KVKK details */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--color-charcoal);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 3rem;
  position: relative;
  transform: scale(0.9);
  transition: var(--transition-smooth);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: var(--color-alabaster);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.modal-close:hover {
  color: var(--color-bronze);
}

.modal-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1rem;
}

/* Footer Styling */
footer {
  background: #060708;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding: 5rem 0 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 5rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  font-size: 1.2rem;
  color: var(--color-bronze);
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 1rem;
}

.footer-col a {
  text-decoration: none;
  color: var(--color-gray-light);
  font-size: 0.9rem;
  transition: var(--transition-smooth);
}

.footer-col a:hover {
  color: var(--color-bronze);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-gray-dark);
}

/* Intersection Observer Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Adjustments */
@media (max-width: 992px) {
  .grid-2col {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .section-title {
    font-size: 2.8rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  nav ul {
    display: none;
  }
}

/* 
   MONOCHROMATIC IMAGE REVEAL SYSTEM 
   Display images in B&W for color-harmony and reveal warm color on hover
*/
.gallery-item img, 
.treatment-media-wrap img {
  filter: grayscale(100%) contrast(1.1) brightness(0.85);
  transition: filter 0.6s cubic-bezier(0.25, 1, 0.5, 1), transform 0.6s cubic-bezier(0.25, 1, 0.5, 1) !important;
}

.gallery-item:hover img, 
.treatment-card:hover .treatment-media-wrap img {
  filter: grayscale(0%) contrast(1.05) brightness(1.0);
}