/*
 * style.css
 * Theme: Bilgisayar Teknolojisi 2025
 * Design System: Brutalism with Dynamic Color Transitions
 * Author: AI Model
 */

/* -------------------------------------------------------------------
   1. CSS Variables & Root Styles
------------------------------------------------------------------- */

:root {
    /* Color Palette (Monochrome) */
    --color-background-dark: #111111;
    --color-background-light: #F4F4F4;
    --color-text-light: #FFFFFF;
    --color-text-dark: #222222;
    --color-text-muted: #A0A0A0;
    --color-border-brutal: #FFFFFF;
    --color-border-dark: #333333;

    /* Dynamic Gradient for Accents */
    --dynamic-gradient: linear-gradient(135deg, #555555 0%, #999999 50%, #555555 100%);

    /* Typography */
    --font-primary: 'Raleway', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;

    /* Sizing & Spacing */
    --header-height: 80px;
    --section-padding-y: 6rem;
    --container-width: 1200px;
    --container-padding-x: 1.5rem;

    /* Borders & Transitions */
    --border-radius: 0;
    --border-thick: 2px solid var(--color-border-brutal);
    --border-dark: 2px solid var(--color-border-dark);
    --transition-fast: 0.3s ease-in-out;
}

/* -------------------------------------------------------------------
   2. Base & Typography
------------------------------------------------------------------- */

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

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

body {
    background-color: var(--color-background-dark);
    color: var(--color-text-light);
    font-family: var(--font-secondary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 900;
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--color-text-light);
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--color-text-light);
}

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

/* -------------------------------------------------------------------
   3. Layout & Helpers
------------------------------------------------------------------- */

.container {
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding-x);
    padding-right: var(--container-padding-x);
}

.section-padding {
    padding-top: var(--section-padding-y);
    padding-bottom: var(--section-padding-y);
}

.section-dark {
    background-color: #1a1a1a;
    border-top: var(--border-dark);
    border-bottom: var(--border-dark);
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-text-light);
}

.section-dark .section-title,
.section-dark h3,
.section-dark h4 {
    color: var(--color-text-light);
}

#mission, #insights, #partners, #contact {
    background-color: var(--color-background-light);
    color: var(--color-text-dark);
}

#mission h2, #insights h2, #partners h2, #contact h2,
#mission h3, #insights h3, #partners h3, #contact h3,
#mission h4, #insights h4, #partners h4, #contact h4 {
    color: var(--color-text-dark);
    text-shadow: none;
}

#mission p, #insights p, #partners p, #contact p {
    color: #444;
}

/* -------------------------------------------------------------------
   4. Header & Navigation
------------------------------------------------------------------- */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-dark);
    transition: background-color var(--transition-fast);
}

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

.logo {
    font-family: var(--font-primary);
    font-weight: 900;
    font-size: 1.5rem;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.main-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.main-nav a {
    color: var(--color-text-light);
    font-family: var(--font-primary);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    padding: 0.5rem 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-text-light);
    transition: width var(--transition-fast);
}

.main-nav a:hover::after {
    width: 100%;
}

.burger-menu {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.burger-menu span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text-light);
    margin: 5px 0;
    transition: all var(--transition-fast);
}

/* -------------------------------------------------------------------
   5. Hero Section
------------------------------------------------------------------- */

.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-text-light);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    color: var(--color-text-light);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

/* -------------------------------------------------------------------
   6. Global Components (Buttons, Cards, Forms)
------------------------------------------------------------------- */

/* Buttons */
.btn, button, input[type="submit"] {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
    color: var(--color-text-dark);
    background-color: var(--color-text-light);
    border: var(--border-thick);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn:hover, button:hover, input[type="submit"]:hover {
    color: var(--color-text-light);
    background-color: transparent;
    border-color: var(--color-text-light);
    transform: translateY(-3px);
}

#mission .btn, #insights .btn, #contact .btn {
    color: var(--color-text-light);
    background-color: var(--color-text-dark);
    border: var(--border-dark);
}
#mission .btn:hover, #insights .btn:hover, #contact .btn:hover {
    color: var(--color-text-dark);
    background-color: transparent;
}


/* Cards */
.card {
    background-color: #222;
    border: 1px solid var(--color-border-dark);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.card-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-fast);
}

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

.card-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-content h3 {
    margin-bottom: 0.5rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-family: var(--font-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background-color: #e0e0e0;
    border: 2px solid #ccc;
    border-radius: var(--border-radius);
    color: var(--color-text-dark);
    font-family: var(--font-secondary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-text-dark);
}

/* -------------------------------------------------------------------
   7. Section Specific Styles
------------------------------------------------------------------- */

/* Mission Section */
.columns-container {
    display: flex;
    gap: 4rem;
    align-items: center;
}

.column-content {
    flex: 1;
}

.column-image {
    flex: 0 0 45%;
}

.column-image .image-container {
    border: var(--border-dark);
    padding: 10px;
    background: #fff;
    box-shadow: 10px 10px 0 var(--color-text-dark);
}


/* Statistics Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-widget {
    background-color: #222;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--color-border-dark);
}

.stat-number {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    background: var(--dynamic-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: gradient-text 5s linear infinite;
}

.stat-label {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
}

.progress-bar-container {
    height: 8px;
    background-color: var(--color-border-dark);
    margin-top: 1rem;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: var(--dynamic-gradient);
    transition: width 1.5s ease-out;
}

@keyframes gradient-text {
    to { background-position: 200% center; }
}

/* Insights Section */
.insights-container {
    display: grid;
    gap: 1.5rem;
}

.insight-card {
    background: #fff;
    border: var(--border-dark);
    padding: 2rem;
}

.insight-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    cursor: pointer;
}
.insight-header h4 {
    margin-bottom: 0;
}

.insight-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

/* Switch UI Component */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}
.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}
input:checked + .slider {
    background-color: var(--color-text-dark);
}
input:checked + .slider:before {
    transform: translateX(26px);
}


/* Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

/* Partners Section */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4rem;
}

.partner-logo img {
    max-height: 40px;
    width: auto;
    filter: grayscale(100%) contrast(0) brightness(1.5);
    opacity: 0.7;
    transition: all var(--transition-fast);
}
.partner-logo img:hover {
    filter: none;
    opacity: 1;
}

/* Resources Section */
.resources-list {
    max-width: 800px;
    margin: 0 auto;
}
.resource-item {
    border: var(--border-thick);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: background-color var(--transition-fast);
}
.resource-item:hover {
    background-color: #222;
}
.resource-title a {
    color: var(--color-text-light);
    font-family: var(--font-primary);
    font-weight: 700;
}
.resource-title a:hover {
    text-decoration: underline;
}
.resource-description {
    color: var(--color-text-muted);
}


/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: #fff;
    padding: 3rem;
    border: var(--border-dark);
}
.contact-info strong {
    color: var(--color-text-dark);
}


/* -------------------------------------------------------------------
   8. Footer
------------------------------------------------------------------- */

.site-footer {
    background-color: #1a1a1a;
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--color-border-dark);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-column h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-light);
}

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

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border-dark);
    padding-top: 2rem;
}


/* -------------------------------------------------------------------
   9. Standalone Pages (Success, Privacy, Terms)
------------------------------------------------------------------- */
.standalone-page {
    background-color: var(--color-background-light);
    color: var(--color-text-dark);
}

.standalone-page .site-header {
    background: rgba(244, 244, 244, 0.8);
    border-bottom: 1px solid #ddd;
}
.standalone-page .logo,
.standalone-page .main-nav a {
    color: var(--color-text-dark);
}
.standalone-page .burger-menu span {
    background-color: var(--color-text-dark);
}

.burger-menu.is-active span {
  background: #fff;
}

.page-content {
    padding-top: calc(var(--header-height) + 4rem);
    padding-bottom: 4rem;
    min-height: 80vh;
}

.page-content h1, .page-content h2 {
    color: var(--color-text-dark);
    text-shadow: none;
}

.success-page-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
}

.success-page-container h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--color-text-dark);
}

.success-page-container p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}


/* -------------------------------------------------------------------
   10. Responsive Design
------------------------------------------------------------------- */

@media (max-width: 992px) {
    h1 { font-size: 2.8rem; }
    .hero-title { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 2rem; }
    .hero-title { font-size: 2.8rem; }

    .section-padding {
        padding-top: 4rem;
        padding-bottom: 4rem;
    }
    
    .columns-container {
        flex-direction: column;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    /* Mobile Navigation */
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--color-background-dark);
        display: flex;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform var(--transition-fast);
    }

    .main-nav.is-active {
        transform: translateX(0);
    }

    .main-nav ul {
        flex-direction: column;
        gap: 2.5rem;
    }
    
    .main-nav a {
        font-size: 1.5rem;
    }

    .burger-menu {
        display: block;
    }

    .burger-menu.is-active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .burger-menu.is-active span:nth-child(2) {
        opacity: 0;
    }
    .burger-menu.is-active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

textarea {
  resize: none;
}

.policy-container {
  margin-top: 80px;
  margin-bottom: 80px;
}

.values-grid {
   display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding-left: 16px;
    padding-right: 16px;
}

.value-card p,
.team-grid p {
  color: #fff;
}

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

.testimonials-grid {
  padding-left: 20px;
  padding-right: 20px;
}

.testimonials-grid p {
  color: #fff;
}

.testimonials-grid blockquote {
  margin-left: 0;
  margin-right: 0;
}

.testimonials-grid cite {
  color: #eee;
}

.testimonial-card:last-child .card-image img {
  object-position: top;
}

.switch {
  flex-shrink: 0;
  margin-left: 8px;
}

.main-nav.is-active ul li a {
  color: #fff;
}