/* ==========================================================================
   Layout — container, navbar, footer, page header
   ========================================================================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---- Navbar ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    display: inline-flex;
    align-items: center;
}

.nav-logo img {
    height: 45px;
    width: auto;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    background: none;
    border: none;
}

.hamburger:hover {
    background-color: rgba(44, 85, 48, 0.08);
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-6px, -6px);
}

/* ---- Page Header ---- */
.page-header {
    background: var(--gradient-primary);
    color: white;
    padding: 8rem 0 4rem;
    margin-top: 0;
}

.page-header h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
}

.page-header .header-content {
    text-align: center;
}

/* ---- Footer ---- */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
}

.footer-section h3 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 0.5rem;
}

.tubitak-logo img {
    width: 100%;
    max-width: 320px;
    height: auto;
    margin-bottom: 1rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
    font-size: 0.95rem;
}

/* Sayfa main wrapper, fixed navbar için padding */
main {
    min-height: calc(100vh - var(--navbar-height));
}