/* System Kodlari */
:root {
    --color-bg: #fbfbfb;
    --color-surface: #ffffff;
    --color-surface-alt: #f9fafb;

    --color-text: #1f2937;
    --color-text-muted: #667085;
    --color-heading: #0f172a;

    --color-primary: #1e2a44;
    --color-primary-hover: #162033;
    --color-border: #e5e7eb;

    --font-main: "Roboto Slab", sans-serif;

    --font-size-sm: 0.875rem;
    --font-size-base: clamp(1rem, 1rem + ((1vw - 0.2rem) * 0.227), 1.125rem);
    --font-size-h1: clamp(2rem, 1.6rem + 1.5vw, 2.8rem);
    --font-size-h2: clamp(1.4rem, 1.2rem + 0.8vw, 1.8rem);
    --font-size-logo: 1.7rem;

    --line-height-body: 1.75;
    --line-height-heading: 1.25;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;

    --radius-sm: 0.3rem;
    --radius-md: 0.875rem;
    --radius-lg: 1.25rem;

    --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);

    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;

    --container-width: 1250px;
    --content-width: 720px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: var(--line-height-body);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-optical-sizing: auto;
}

img,
picture {
    display: block;
    max-width: 100%;
}

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

ul,
ol {
    list-style: none;
}

button,
input,
textarea,
select {
    font: inherit;
    color: inherit;
}

button {
    border: 0;
    background: none;
    cursor: pointer;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--color-heading);
    line-height: var(--line-height-heading);
    font-weight: 600;
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

p {
    font-size: var(--font-size-base);
    line-height: var(--line-height-body);
}

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding-inline: var(--space-4);
}

/* Header */
.header {
    width: 100%;
    background-color: var(--color-bg);
    position: relative;
    z-index: 50;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-block: 1.5rem;
}

.header-logo a {
    display: inline-flex;
    align-items: center;
    font-size: var(--font-size-logo);
    line-height: 1;
    color: var(--color-heading);
}

.header-logo a:hover {
    color: var(--color-primary);
}

.logo-strong {
    font-weight: 700;
}

.logo-light {
    font-weight: 300;
}

.header-logo i {
    font-size: 0.75rem;
    color: var(--color-primary);
    transform: translateY(-0.1rem);
}

/* Sağ alan */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    position: relative;
}

/* Desktop menu */
.header-menu {
    display: block;
}

.header-menu-inner {
    display: contents;
}

.header-menu-section {
    display: contents;
}

.header-menu-top,
.header-menu-heading,
.header-menu-categories,
.menu-close {
    display: none;
}

.header-menu-links,
.header-menu-categories {
    list-style: none;
    padding: 0;
    margin: 0;
}

.header-menu-links {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.header-menu-links a {
    display: inline-flex;
    align-items: center;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1;
    padding: var(--space-2) 0;
}

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

/* Mobile toggle button */
.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-heading);
    transition: all var(--transition-fast);
    position: relative;
    z-index: 130;
}

.menu-toggle:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.menu-toggle i {
    font-size: 1.25rem;
    line-height: 1;
}

.menu-toggle.is-hidden {
    display: none;
}

/* Overlay */
.menu-overlay {
    display: none;
}

/* Alt kategori nav */
.header-nav {
    width: 100%;
    background-color: var(--color-surface-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.header-nav .container {
    min-height: 56px;
    display: flex;
    align-items: center;
}

.header-categories {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    width: 100%;
}

.header-categories a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    color: var(--color-text);
    white-space: nowrap;
    font-size: 1rem;
}

.header-categories a:hover,
.header-categories a.active {
    color: var(--color-primary);
}

/* Layout System */
.layout-grid {
    display: grid;
    gap: var(--space-4);
}

.layout-single {
    grid-template-columns: minmax(0, 1fr);
}

.layout-sidebar {
    grid-template-columns: minmax(0, 3fr) minmax(330px, 1fr);
    align-items: start;
}

.layout-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.layout-main,
.layout-aside,
.layout-col {
    min-width: 0;
}

.layout-content-width {
    max-width: var(--content-width);
}

.layout-content-centered {
    margin-inline: auto;
}

.layout-narrow {
    max-width: 860px;
    margin-inline: auto;
}

.layout-wide {
    max-width: 100%;
}

.layout-aside {
    align-self: start;
}

/* Genel Section */
.section {
    padding-block: var(--space-4);
}



/* Responsive */
@media (max-width: 992px) {
    .layout-sidebar,
    .layout-split {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 768px) {
    .header-top {
        padding-block: var(--space-5);
    }

    .header-logo a {
        font-size: 1.7rem;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .header-nav {
        display: none;
    }

    .header-menu {
        display: block;
        position: fixed;
        inset: 0;
        width: 100%;
        height: 100vh;
        background-color: var(--color-surface);
        transform: translateX(100%);
        transition: transform var(--transition-base);
        z-index: 120;
        overflow-y: auto;
    }

    .header-menu.is-open {
        transform: translateX(0);
    }

    .header-menu-inner {
        display: flex;
        flex-direction: column;
        min-height: 100%;
        padding: var(--space-5);
        padding-top: 1.25rem;
    }

    .header-menu-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-4);
        padding-bottom: var(--space-5);
        margin-bottom: var(--space-5);
        border-bottom: 1px solid var(--color-border);
    }

    .header-menu-title {
        font-size: 1.4rem;
        font-weight: 600;
        color: var(--color-heading);
    }

    .menu-close {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        background-color: var(--color-surface);
        color: var(--color-heading);
    }

    .menu-close i {
        font-size: 1.5rem;
        line-height: 1;
    }

    .header-menu-section {
        display: block;
    }

    .header-menu-section + .header-menu-section {
        margin-top: var(--space-4);
    }

    .header-menu-links {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .header-menu-links li {
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }

    .header-menu-links a {
        display: flex;
        align-items: center;
        width: 100%;
        padding: 1rem 0;
        font-size: 1rem;
        font-weight: 500;
        color: var(--color-heading);
    }

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

    .header-menu-heading {
        display: block;
        margin-bottom: var(--space-4);
    }

    .header-menu-heading span {
        display: inline-flex;
        font-size: 1rem;
        font-weight: 600;
        color: var(--color-text-muted);
        letter-spacing: 0.02em;
    }

    .header-menu-categories {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--space-2);
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .header-menu-categories li {
        min-width: 0;
    }

    .header-menu-categories a {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 52px;
        padding: 0.85rem 1rem;
        text-align: center;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        background-color: var(--color-surface-alt);
        color: var(--color-heading);
        font-size: 0.98rem;
        font-weight: 500;
        line-height: 1.3;
    }

    .header-menu-categories a:hover,
    .header-menu-categories a.active {
        color: var(--color-primary);
        border-color: var(--color-border);
        background-color: var(--color-surface);
    }

    .menu-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.35);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-base), visibility var(--transition-base);
        z-index: 110;
    }

    .menu-overlay.is-open {
        opacity: 1;
        visibility: visible;
    }
}