/* =====================================================================
   Curevia.net - Temel Katman (reset + yerlesim + erisilebilirlik)
   Bagimlilik: tokens.css
   ===================================================================== */

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + var(--space-4));
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg);
    background-image: var(--color-bg-pattern);
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-3);
    font-weight: var(--weight-semibold);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--color-text);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p {
    margin: 0 0 var(--space-4);
}

p:last-child {
    margin-bottom: 0;
}

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

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

ul,
ol {
    margin: 0 0 var(--space-4);
    padding-left: var(--space-5);
}

li {
    margin-bottom: var(--space-2);
}

hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-8) 0;
}

code,
kbd,
pre {
    font-family: var(--font-mono);
    font-size: 0.875em;
}

code {
    background: var(--color-surface-3);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-xs);
}

pre {
    background: var(--color-surface-3);
    padding: var(--space-4);
    border-radius: var(--radius-sm);
    overflow-x: auto;
}

button {
    font: inherit;
    color: inherit;
}

/* --- Odak gorunurlugu (klavye kullanimi) ----------------------------- */
:focus-visible {
    outline: 2px solid transparent;
    outline-offset: 2px;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-xs);
}

/* --- Erisilebilirlik yardimcilari ----------------------------------- */
/* hidden attribute'u HER ZAMAN kazanir: display kullanan bilesen
   siniflari (.alert, .modal, .dropdown__panel) aksi halde bunu ezerdi. */
[hidden] {
    display: none !important;
}

.sr-only {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    z-index: var(--z-toast);
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary);
    color: var(--color-primary-fg);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    font-weight: var(--weight-semibold);
    transition: top var(--transition);
}

.skip-link:focus {
    top: 0;
    text-decoration: none;
    color: var(--color-primary-fg);
}

/* --- Yerlesim --------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-lg);
    margin-inline: auto;
    padding-inline: var(--space-5);
}

.container--narrow {
    max-width: var(--container-md);
}

.container--wide {
    max-width: var(--container-xl);
}

.page {
    flex: 1 1 auto;
    width: 100%;
    padding-block: var(--space-10) var(--space-16);
}

.page--flush {
    padding-block: 0;
}

.section {
    margin-bottom: var(--space-16);
}

.section:last-child {
    margin-bottom: 0;
}

.section__head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.section__title {
    margin: 0;
    font-size: var(--text-2xl);
    letter-spacing: var(--tracking-tight);
}

.section__lead {
    margin: var(--space-2) 0 0;
    max-width: 62ch;
    color: var(--color-text-muted);
    font-size: var(--text-md);
}

.section__eyebrow {
    display: inline-block;
    margin-bottom: var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
}

/* --- Izgara ----------------------------------------------------------- */
.grid {
    display: grid;
    gap: var(--space-5);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr)); }

@media (min-width: 48rem) {
    .grid--tight { gap: var(--space-4); }
    .grid--loose { gap: var(--space-8); }
}

/* --- Yardimci siniflar ------------------------------------------------ */
.stack > * + * { margin-top: var(--space-4); }
.stack-sm > * + * { margin-top: var(--space-2); }
.stack-lg > * + * { margin-top: var(--space-6); }

.cluster {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
}

.cluster--between {
    justify-content: space-between;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }
.text-semibold { font-weight: var(--weight-semibold); }
.text-mono { font-family: var(--font-mono); }
.text-nowrap { white-space: nowrap; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-1 { flex: 1 1 auto; min-width: 0; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

.hidden { display: none !important; }
.d-block { display: block; }
.w-full { width: 100%; }
.max-w-prose { max-width: 68ch; }
.divider { height: 1px; background: var(--color-border); border: 0; }

.prose {
    max-width: 72ch;
    line-height: var(--leading-relaxed);
}

.prose h2 { margin-top: var(--space-10); }
.prose h3 { margin-top: var(--space-8); }
.prose ul { padding-left: var(--space-6); }

/* --- Tema gecisi (yumusak) ------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
    body,
    .card,
    .btn,
    .input {
        transition: background-color var(--transition), border-color var(--transition),
                    color var(--transition);
    }
}