/* IBM Power ile Güç Sende - Ana CSS Dosyası */
/* Carbon Design System ve IBM Plex Sans entegrasyonu */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

/* CSS Variables - Carbon Design System Colors */
:root {
  /* Primary Colors */
  --ibm-blue-60: #0062ff;
  --ibm-blue-70: #054ada;
  --ibm-blue-80: #0530ad;
  
  /* Gray Scale */
  --gray-10: #f4f4f4;
  --gray-20: #e0e0e0;
  --gray-30: #c6c6c6;
  --gray-40: #a8a8a8;
  --gray-50: #8d8d8d;
  --gray-60: #6f6f6f;
  --gray-70: #525252;
  --gray-80: #393939;
  --gray-90: #262626;
  --gray-100: #161616;
  
  /* Support Colors */
  --support-error: #da1e28;
  --support-success: #24a148;
  --support-warning: #f1c21b;
  --support-info: #0043ce;
  
  /* Spacing */
  --spacing-01: 0.125rem;
  --spacing-02: 0.25rem;
  --spacing-03: 0.5rem;
  --spacing-04: 0.75rem;
  --spacing-05: 1rem;
  --spacing-06: 1.5rem;
  --spacing-07: 2rem;
  --spacing-08: 2.5rem;
  --spacing-09: 3rem;
  --spacing-10: 4rem;
  --spacing-11: 5rem;
  --spacing-12: 6rem;
  
  /* Typography */
  --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  
  /* Shadows */
  --shadow-01: 0 1px 2px 0 rgba(0, 0, 0, 0.10);
  --shadow-02: 0 2px 4px 0 rgba(0, 0, 0, 0.10);
  --shadow-03: 0 4px 8px 0 rgba(0, 0, 0, 0.10);
  --shadow-04: 0 8px 16px 0 rgba(0, 0, 0, 0.10);
  
  /* Border Radius */
  --radius-01: 2px;
  --radius-02: 4px;
  --radius-03: 8px;
  
  /* Transitions */
  --transition-base: all 0.2s ease-in-out;
  --transition-slow: all 0.4s ease-in-out;
}

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

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

body {
  font-family: var(--font-family);
  font-weight: 400;
  line-height: 1.5;
  color: var(--gray-100);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-05);
  color: var(--gray-100);
}

h1 {
  font-size: 3.75rem;
  font-weight: 300;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2.625rem;
  font-weight: 300;
}

h3 {
  font-size: 2rem;
  font-weight: 400;
}

h4 {
  font-size: 1.75rem;
  font-weight: 400;
}

h5 {
  font-size: 1.25rem;
  font-weight: 400;
}

h6 {
  font-size: 1rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-05);
  color: var(--gray-80);
}

a {
  color: var(--ibm-blue-60);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  color: var(--ibm-blue-70);
  text-decoration: underline;
}

/* Utility Classes */
.container {
  max-width: 1584px;
  margin: 0 auto;
  padding: 0 var(--spacing-05);
}

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

.mt-1 { margin-top: var(--spacing-01); }
.mt-2 { margin-top: var(--spacing-02); }
.mt-3 { margin-top: var(--spacing-03); }
.mt-4 { margin-top: var(--spacing-04); }
.mt-5 { margin-top: var(--spacing-05); }
.mt-6 { margin-top: var(--spacing-06); }
.mt-7 { margin-top: var(--spacing-07); }
.mt-8 { margin-top: var(--spacing-08); }

.mb-1 { margin-bottom: var(--spacing-01); }
.mb-2 { margin-bottom: var(--spacing-02); }
.mb-3 { margin-bottom: var(--spacing-03); }
.mb-4 { margin-bottom: var(--spacing-04); }
.mb-5 { margin-bottom: var(--spacing-05); }
.mb-6 { margin-bottom: var(--spacing-06); }
.mb-7 { margin-bottom: var(--spacing-07); }
.mb-8 { margin-bottom: var(--spacing-08); }

.p-1 { padding: var(--spacing-01); }
.p-2 { padding: var(--spacing-02); }
.p-3 { padding: var(--spacing-03); }
.p-4 { padding: var(--spacing-04); }
.p-5 { padding: var(--spacing-05); }
.p-6 { padding: var(--spacing-06); }
.p-7 { padding: var(--spacing-07); }
.p-8 { padding: var(--spacing-08); }

/* Buttons - Carbon Design System Style */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.125rem;
  padding: calc(var(--spacing-05) - 3px) calc(var(--spacing-06) - 3px);
  border: 0;
  border-radius: 0;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  position: relative;
  min-height: 3rem;
}

.btn-primary {
  background-color: var(--ibm-blue-60);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--ibm-blue-70);
  color: #ffffff;
  text-decoration: none;
}

.btn-secondary {
  background-color: transparent;
  color: var(--ibm-blue-60);
  box-shadow: inset 0 0 0 1px var(--ibm-blue-60);
}

.btn-secondary:hover {
  background-color: var(--ibm-blue-60);
  color: #ffffff;
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--ibm-blue-60);
  padding: calc(var(--spacing-05) - 2px) var(--spacing-05);
}

.btn-ghost:hover {
  background-color: var(--gray-10);
  text-decoration: none;
}

/* Forms - Carbon Design System Style */
.form-group {
  margin-bottom: var(--spacing-07);
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1rem;
  letter-spacing: 0.02em;
  color: var(--gray-70);
  margin-bottom: var(--spacing-03);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 0 var(--spacing-05);
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.125rem;
  color: var(--gray-100);
  background-color: var(--gray-10);
  border: 0;
  border-bottom: 1px solid var(--gray-50);
  height: 2.5rem;
  transition: var(--transition-base);
}

.form-textarea {
  min-height: 5rem;
  padding-top: var(--spacing-03);
  padding-bottom: var(--spacing-03);
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: 2px solid var(--ibm-blue-60);
  outline-offset: -2px;
  border-bottom-color: var(--ibm-blue-60);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--gray-10);
  color: var(--gray-50);
  cursor: not-allowed;
}

.form-error {
  display: block;
  font-size: 0.75rem;
  color: var(--support-error);
  margin-top: var(--spacing-02);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-04);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"],
.form-radio input[type="radio"] {
  width: 1.125rem;
  height: 1.125rem;
  margin-right: var(--spacing-03);
  margin-top: 0.125rem;
  flex-shrink: 0;
  cursor: pointer;
}

.form-checkbox label,
.form-radio label {
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--gray-100);
  cursor: pointer;
}

/* Cards */
.card {
  background-color: #ffffff;
  border: 1px solid var(--gray-20);
  box-shadow: var(--shadow-01);
  transition: var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-03);
}

.card-image {
  width: 100%;
  height: auto;
  display: block;
}

.card-body {
  padding: var(--spacing-05);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-03);
}

.card-text {
  font-size: 0.875rem;
  color: var(--gray-70);
  margin-bottom: var(--spacing-05);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-05);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Section Spacing */
.section {
  padding: var(--spacing-10) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-08);
}

/* Header */
.header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--gray-20);
  padding: var(--spacing-05) 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-logo-link {
  display: inline-block;
}

.header-logo {
  height: 2.5rem;
  width: auto;
  transition: var(--transition-base);
}

.header-logo:hover {
  transform: scale(1.05);
}

.header-nav {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-07);
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--gray-80);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  padding: var(--spacing-03) var(--spacing-04);
  border-radius: var(--radius-02);
  transition: var(--transition-base);
  position: relative;
}

.nav-link:hover {
  color: var(--ibm-blue-60);
  background-color: var(--gray-10);
}

.nav-link.active {
  color: var(--ibm-blue-60);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background-color: var(--ibm-blue-60);
  border-radius: 1px;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-02);
  gap: 3px;
}

.mobile-menu-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--gray-80);
  transition: var(--transition-base);
}

.mobile-menu-toggle:hover span {
  background-color: var(--ibm-blue-60);
}

/* Hero Section with Video Background */
.hero {
  position: relative;
  height: 50vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  z-index: -1;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #ffffff;
  padding: 0 var(--spacing-05);
}

.hero-title {
  font-size: 4.5rem;
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: var(--spacing-07);
  color: #ffffff;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.8);
}

/* Anasayfa Kayıt Butonu */
.btn-register-home {
  font-size: 1.25rem !important;
  font-weight: 600 !important;
  padding: var(--spacing-05) var(--spacing-07) !important;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-radius: var(--radius-03);
  transition: all 0.3s ease;
}

.btn-register-home:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 98, 254, 0.3);
}

/* Footer */
.footer {
  background-color: var(--gray-100);
  color: #ffffff;
  padding: var(--spacing-08) 0;
  text-align: center;
}

.footer p {
  color: #ffffff;
  margin-bottom: 0;
}

.footer a {
  color: #ffffff;
  text-decoration: underline;
}

.footer a:hover {
  color: var(--gray-30);
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: #ffffff;
  max-width: 90%;
  max-height: 90%;
  overflow: auto;
  position: relative;
  box-shadow: var(--shadow-04);
}

.modal-close {
  position: absolute;
  top: var(--spacing-05);
  right: var(--spacing-05);
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-70);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.modal-close:hover {
  background-color: var(--gray-10);
}

/* Swiper/Carousel Overrides */
.swiper {
  padding: 0 var(--spacing-05);
}

.swiper-button-next,
.swiper-button-prev {
  color: var(--ibm-blue-60);
  width: 2.5rem;
  height: 2.5rem;
}

.swiper-button-next:after,
.swiper-button-prev:after {
  font-size: 1.25rem;
}

.swiper-pagination-bullet {
  background: var(--gray-50);
  opacity: 1;
}

.swiper-pagination-bullet-active {
  background: var(--ibm-blue-60);
}

/* Countdown Timer */
.countdown {
  display: flex;
  justify-content: center;
  gap: var(--spacing-06);
  margin: var(--spacing-08) 0;
}

.countdown-item {
  text-align: center;
}

.countdown-number {
  display: block;
  font-size: 3rem;
  font-weight: 300;
  line-height: 1;
  color: var(--ibm-blue-60);
  margin-bottom: var(--spacing-03);
}

.countdown-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-70);
}

/* Özel Etkinlik Tasarımları */
.event-single {
  display: grid;
  grid-template-columns: 300px 1fr 300px;
  gap: var(--spacing-07);
  align-items: center;
  background-color: #ffffff;
  border: 1px solid var(--gray-20);
  border-radius: var(--radius-03);
  box-shadow: var(--shadow-02);
  padding: var(--spacing-07);
  margin-bottom: var(--spacing-06);
}

.event-single-image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-02);
}

.event-single-content h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-04);
  color: var(--gray-100);
}

.event-single-content p {
  color: var(--gray-70);
  margin-bottom: var(--spacing-05);
  line-height: 1.6;
}

.event-single-sidebar {
  text-align: center;
}

.event-single-countdown {
  margin-bottom: var(--spacing-06);
}

.event-single-countdown .countdown {
  margin: 0;
  gap: var(--spacing-04);
}

.event-single-countdown .countdown-number {
  font-size: 2rem;
}

.event-dual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-06);
}

.event-dual-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--spacing-05);
  background-color: #ffffff;
  border: 1px solid var(--gray-20);
  border-radius: var(--radius-03);
  box-shadow: var(--shadow-01);
  padding: var(--spacing-06);
  align-items: center;
}

.event-dual-item:hover {
  box-shadow: var(--shadow-03);
}

.event-dual-image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-02);
}

.event-dual-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-03);
  color: var(--gray-100);
}

.event-dual-content p {
  color: var(--gray-70);
  margin-bottom: var(--spacing-04);
  font-size: 0.875rem;
}

.event-triple-featured {
  background-color: #ffffff;
  border: 1px solid var(--gray-20);
  border-radius: var(--radius-03);
  box-shadow: var(--shadow-02);
  padding: var(--spacing-07);
  margin-bottom: var(--spacing-06);
  display: grid;
  grid-template-columns: 300px 1fr 250px;
  gap: var(--spacing-06);
  align-items: center;
}

.event-triple-remaining {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-05);
}

/* Loading Spinner */
.loading {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  border: 2px solid var(--gray-20);
  border-top-color: var(--ibm-blue-60);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Neden IBM Power Section */
.why-ibm-power {
  background-color: var(--gray-10);
  padding: var(--spacing-10) 0;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-06);
  max-width: 1584px;
  margin: 0 auto;
  padding: 0 var(--spacing-05);
}

.why-item {
  background-color: #ffffff;
  padding: var(--spacing-08);
  border-radius: var(--radius-03);
  box-shadow: var(--shadow-02);
  transition: var(--transition-base);
}

.why-item:hover {
  box-shadow: var(--shadow-04);
  transform: translateY(-4px);
}

.why-icon {
  width: 64px;
  height: 64px;
  background-color: var(--ibm-blue-60);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-06);
  font-size: 2rem;
  color: #ffffff;
}

.why-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-100);
  margin-bottom: var(--spacing-04);
}

.why-description {
  color: var(--gray-70);
  line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1056px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-05);
    padding: 0 var(--spacing-05);
  }
  
  .event-single {
    grid-template-columns: 250px 1fr 250px;
    gap: var(--spacing-05);
    padding: var(--spacing-06);
  }
  
  .event-triple-featured {
    grid-template-columns: 250px 1fr 200px;
    gap: var(--spacing-05);
    padding: var(--spacing-06);
  }
  
  .event-dual-item {
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-04);
    padding: var(--spacing-05);
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #ffffff;
    border: 1px solid var(--gray-20);
    border-radius: var(--radius-02);
    box-shadow: var(--shadow-03);
    flex-direction: column;
    gap: 0;
    min-width: 200px;
    padding: var(--spacing-04);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-link {
    padding: var(--spacing-04);
    border-radius: var(--radius-02);
    width: 100%;
    text-align: left;
  }
  
  .nav-link.active::after {
    display: none;
  }
}

@media (max-width: 672px) {
  h1 { font-size: 2.625rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.75rem; }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.625rem;
  }
  
  .countdown {
    gap: var(--spacing-04);
  }
  
  .countdown-number {
    font-size: 2rem;
  }
  
  .container {
    padding: 0 var(--spacing-04);
  }
  
  .why-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-05);
    padding: 0 var(--spacing-04);
  }
  
  .event-single {
    grid-template-columns: 1fr;
    gap: var(--spacing-05);
    text-align: center;
  }
  
  .event-dual {
    grid-template-columns: 1fr;
  }
  
  .event-dual-item {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-04);
  }
  
  .event-triple-featured {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-05);
  }
  
  .event-triple-remaining {
    grid-template-columns: 1fr;
  }
}

/* iPhone 11-16 Specific Media Queries */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 430px) 
  and (-webkit-device-pixel-ratio: 2) {
  
  body {
    -webkit-text-size-adjust: 100%;
  }
  
  .hero {
    height: 40vh; /* Mobile height */
  }
  
  .hero-title {
    font-size: 2rem;
    padding: 0 var(--spacing-05);
  }
  
  .btn {
    min-height: 2.75rem;
    font-size: 1rem;
  }
}

/* WQHD (2560x1440) Support */
@media (min-width: 2560px) {
  .container {
    max-width: 2304px;
  }
  
  html {
    font-size: 18px;
  }
}