/* PE Mimarlik - Modern Architecture Website
   Minimal, Professional Design */

/* ==================== CSS Variables ==================== */
:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-50: #fafafa;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  --header-height: 100px;
  --container-max: 1400px;
  --container-padding: 1.5rem;
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-4);
}

/* ==================== Layout ==================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--spacing-20) 0;
}

.section--dark {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

/* ==================== Header ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-white);
  z-index: 1000;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.header--scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.header--dark {
  background-color: var(--color-black);
}

.header--dark .header__logo,
.header--dark .nav__link,
.header--dark .lang-switch__btn {
  color: var(--color-white);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.header__logo-img {
  height: 50px;
  width: auto;
}

.header__logo img {
  height: 40px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.nav__list {
  display: flex;
  gap: var(--spacing-8);
}

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-gray-700);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-black);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Language Switch */
.lang-switch {
  display: flex;
  gap: var(--spacing-1);
  margin-left: var(--spacing-6);
  padding-left: var(--spacing-6);
  border-left: 1px solid var(--color-gray-200);
}

.lang-switch__btn {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-400);
  padding: var(--spacing-1) var(--spacing-2);
  transition: color var(--transition-fast);
}

.lang-switch__btn:hover,
.lang-switch__btn--active {
  color: var(--color-black);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-2);
}

.menu-toggle__line {
  width: 24px;
  height: 2px;
  background-color: var(--color-black);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ==================== Hero Section ==================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-black);
  color: var(--color-white);
  overflow: hidden;
}

.hero__slider {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.hero__slide--active {
  opacity: 1;
}

.hero__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.6));
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--spacing-6);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards 0.3s;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gray-300);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards 0.5s;
}

.hero__scroll {
  position: absolute;
  bottom: var(--spacing-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-white);
  opacity: 0;
  animation: fadeIn 1s ease forwards 1s;
}

.hero__scroll-text {
  font-size: var(--font-size-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-white), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

/* Slider Navigation */
.hero__nav {
  position: absolute;
  bottom: var(--spacing-10);
  right: var(--spacing-10);
  z-index: 3;
  display: flex;
  gap: var(--spacing-3);
}

.hero__nav-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--color-white);
  background: transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.hero__nav-dot--active {
  background-color: var(--color-white);
}

/* ==================== Projects Grid ==================== */
.projects {
  padding: var(--spacing-20) 0;
}

.projects__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-12);
  flex-wrap: wrap;
  gap: var(--spacing-6);
}

.projects__title {
  font-size: var(--font-size-3xl);
  font-weight: 400;
}

/* Filter Buttons */
.filter {
  display: flex;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.filter__btn {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  padding: var(--spacing-2) var(--spacing-4);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.filter__btn:hover {
  color: var(--color-black);
}

.filter__btn--active {
  color: var(--color-black);
  border-color: var(--color-black);
}

/* Projects Grid */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-6);
}

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

.project-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-6);
  color: var(--color-white);
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-base);
}

.project-card__title {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--spacing-1);
}

.project-card__category {
  font-size: var(--font-size-sm);
  color: var(--color-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-card:hover .project-card__image {
  transform: scale(1.05);
}

.project-card:hover .project-card__overlay {
  opacity: 1;
}

.project-card:hover .project-card__content {
  transform: translateY(0);
  opacity: 1;
}

/* View All Link */
.projects__more {
  text-align: center;
  margin-top: var(--spacing-12);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--spacing-4) var(--spacing-8);
  border: 1px solid var(--color-black);
  background-color: transparent;
  color: var(--color-black);
  transition: all var(--transition-base);
}

.btn:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn--white {
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn--white:hover {
  background-color: var(--color-white);
  color: var(--color-black);
}

.btn--filled {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn--filled:hover {
  background-color: var(--color-gray-800);
}

/* ==================== About Section ==================== */
.about {
  padding: var(--spacing-24) 0;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  align-items: center;
}

.about__content {
  max-width: 500px;
}

.about__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-4);
}

.about__title {
  font-size: var(--font-size-4xl);
  font-weight: 400;
  margin-bottom: var(--spacing-6);
}

.about__text {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
}

.about__image {
  aspect-ratio: 4/5;
  overflow: hidden;
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Team Section */
.team {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
  margin-top: var(--spacing-16);
}

.team-member {
  text-align: center;
}

.team-member__image {
  width: 250px;
  height: auto;
  margin: 0 auto var(--spacing-4);
  overflow: hidden;
  background-color: var(--color-gray-100);
  border-radius: 8px;
}

.team-member__image img {
  width: 100%;
  height: auto;
  display: block;
}

.team-member__name {
  font-size: var(--font-size-lg);
  font-weight: 500;
  margin-bottom: var(--spacing-1);
}

.team-member__title {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-3);
}

.team-member__bio {
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
  line-height: 1.6;
  max-width: 300px;
  margin: 0 auto;
}

/* ==================== Contact Section ==================== */
.contact {
  padding: var(--spacing-24) 0;
  background-color: var(--color-gray-50);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
}

.contact__info h2 {
  font-size: var(--font-size-4xl);
  font-weight: 400;
  margin-bottom: var(--spacing-8);
}

.contact__details {
  margin-bottom: var(--spacing-8);
}

.contact__item {
  margin-bottom: var(--spacing-6);
}

.contact__item-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-2);
}

.contact__item-value {
  font-size: var(--font-size-lg);
  color: var(--color-gray-800);
}

.contact__item-value a {
  transition: color var(--transition-fast);
}

.contact__item-value a:hover {
  color: var(--color-gray-500);
}

/* Phone Numbers Alignment */
.contact__phones {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.contact__phone-row {
  display: inline-grid;
  grid-template-columns: 175px auto;
  gap: var(--spacing-2);
}

.contact__phone-number {
  white-space: nowrap;
}

.contact__phone-name {
  color: var(--color-gray-600);
}

/* Contact Form */
.contact__form {
  background-color: var(--color-white);
  padding: var(--spacing-10);
}

.form__group {
  margin-bottom: var(--spacing-6);
}

.form__label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
}

.form__input,
.form__textarea {
  width: 100%;
  padding: var(--spacing-4);
  font-family: inherit;
  font-size: var(--font-size-base);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-black);
}

.form__textarea {
  min-height: 150px;
  resize: vertical;
}

.form__submit {
  width: 100%;
  padding: var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: var(--color-black);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.form__submit:hover {
  background-color: var(--color-gray-800);
}

.form__message {
  margin-top: var(--spacing-4);
  padding: var(--spacing-4);
  text-align: center;
  font-size: var(--font-size-sm);
}

.form__message--success {
  background-color: #d4edda;
  color: #155724;
}

.form__message--error {
  background-color: #f8d7da;
  color: #721c24;
}

/* ==================== Footer ==================== */
.footer {
  background-color: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: var(--spacing-12);
  border-bottom: 1px solid var(--color-gray-800);
  margin-bottom: var(--spacing-8);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo-img {
  width: 80px;
  height: auto;
  margin-bottom: var(--spacing-3);
  border-radius: 4px;
}

.footer__logo {
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--spacing-4);
}

.footer__tagline {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

.footer__nav {
  display: flex;
  gap: var(--spacing-12);
}

.footer__nav-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer__nav-link {
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--color-white);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.footer__social {
  display: flex;
  gap: var(--spacing-4);
}

.footer__social-link {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-white);
}

/* ==================== Lightbox ==================== */
.lightbox {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.lightbox--active {
  display: flex;
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox__image {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: var(--spacing-6);
  right: var(--spacing-6);
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  cursor: pointer;
  z-index: 2001;
  transition: opacity var(--transition-fast);
}

.lightbox__close:hover {
  opacity: 0.7;
}

.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-white);
  font-size: var(--font-size-4xl);
  cursor: pointer;
  padding: var(--spacing-4);
  transition: opacity var(--transition-fast);
  z-index: 2001;
}

.lightbox__nav:hover {
  opacity: 0.7;
}

.lightbox__prev {
  left: var(--spacing-6);
}

.lightbox__next {
  right: var(--spacing-6);
}

.lightbox__counter {
  position: absolute;
  bottom: var(--spacing-6);
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-white);
  font-size: var(--font-size-sm);
}

/* ==================== Page Header ==================== */
.page-header {
  padding-top: calc(var(--header-height) + var(--spacing-16));
  padding-bottom: var(--spacing-16);
  background-color: var(--color-gray-50);
  text-align: center;
}

.page-header__title {
  font-size: var(--font-size-4xl);
  font-weight: 400;
  margin-bottom: var(--spacing-4);
}

.page-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
}

/* ==================== Animations ==================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  50.1% {
    transform: scaleY(1);
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
  :root {
    --header-height: 70px;
  }

  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-10);
  }

  .about__content {
    max-width: none;
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--spacing-10);
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }

  /* Mobile Navigation */
  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav--open {
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-8);
  }

  .nav__link {
    font-size: var(--font-size-2xl);
  }

  .lang-switch {
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-200);
  }

  .menu-toggle {
    display: flex;
  }

  .menu-toggle--open .menu-toggle__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle--open .menu-toggle__line:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle--open .menu-toggle__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .hero__nav {
    display: none;
  }

  .team {
    grid-template-columns: 1fr;
  }

  .footer__nav {
    flex-direction: column;
    gap: var(--spacing-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
}

/* ==================== Utility Classes ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--spacing-4); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-12 { margin-top: var(--spacing-12); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }

.hidden { display: none !important; }
.visible { display: block !important; }