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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    width: min(100% - 2rem, var(--container-max));
    margin-inline: auto;
}

/* Layout */
.layout--main { min-height: 100vh; display: flex; flex-direction: column; }
.main-content { flex: 1; padding: 2rem 0 3rem; }
.layout--minimal { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.minimal-content { width: min(100%, 480px); }

/* Topbar */
.topbar {
    position: sticky; top: 0; z-index: 100;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}
.topbar__inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-height);
}
.brand { display: flex; align-items: center; gap: .75rem; color: inherit; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand__icon {
    width: 40px; height: 40px; border-radius: var(--radius-sm);
    background: var(--color-primary-light); color: var(--color-primary);
    display: grid; place-items: center;
}
.brand__icon--lg { width: 56px; height: 56px; }
.brand__icon--xl { width: 72px; height: 72px; border-radius: var(--radius-md); }
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__text small { color: var(--color-text-muted); font-size: .75rem; }

.topnav { display: flex; align-items: center; gap: 1rem; }
.topnav a { color: var(--color-text); font-weight: 500; text-decoration: none; }
.topnav a:hover { color: var(--color-primary); }

.nav-toggle {
    display: none; background: none; border: none; padding: .5rem;
    color: var(--color-text); cursor: pointer;
}

/* Hero */
.hero { display: grid; gap: 2rem; padding: 1rem 0 2rem; }
.hero__content h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); line-height: 1.15; margin: 1rem 0; color: var(--color-secondary); }
.hero__lead { font-size: 1.1rem; color: var(--color-text-muted); max-width: 56ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
.hero__cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.feature-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-md); padding: 1.25rem; box-shadow: var(--shadow-sm);
}
.feature-card i { color: var(--color-primary); width: 28px; height: 28px; }
.feature-card h3 { margin: .75rem 0 .5rem; font-size: 1rem; }
.feature-card p { margin: 0; color: var(--color-text-muted); font-size: .9rem; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
    padding: .625rem 1.125rem; border-radius: var(--radius-sm);
    font-weight: 600; font-size: .9375rem; border: 2px solid transparent;
    cursor: pointer; text-decoration: none; transition: .15s ease;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--secondary { background: var(--color-secondary); color: #fff; }
.btn--secondary:hover { background: #142d47; color: #fff; }
.btn--outline { background: transparent; border-color: var(--color-primary); color: var(--color-primary); }
.btn--outline:hover { background: var(--color-primary-light); }
.btn--ghost { background: transparent; color: var(--color-text-muted); border: none; }
.btn--danger { background: var(--color-danger); color: #fff; border-color: var(--color-danger); }
.btn--danger:hover { background: #B91C1C; color: #fff; }
.btn--block { width: 100%; }
.btn--sm { padding: .4rem .75rem; font-size: .875rem; }
.btn--lg { padding: .75rem 1.25rem; font-size: 1rem; }
.btn--xl { padding: 1rem 1.5rem; font-size: 1.125rem; min-height: 56px; }

/* Lucide ikonları — SVG boyutlandırma */
svg.lucide {
    width: 1.125em;
    height: 1.125em;
    flex-shrink: 0;
    stroke-width: 2;
}

/* Cards */
.card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-md); box-shadow: var(--shadow-sm); overflow: hidden;
}
.card__header { padding: 1rem 1.25rem; border-bottom: 1px solid var(--color-border); }
.card__header h2 { margin: 0; font-size: 1.1rem; display: flex; align-items: center; gap: .5rem; }
.card__body { padding: 1.25rem; }
.card__icon {
    width: 48px; height: 48px; border-radius: var(--radius-sm);
    display: grid; place-items: center; margin-bottom: .75rem;
}
.card__icon--primary { background: var(--color-primary-light); color: var(--color-primary); }
.card__icon--secondary { background: #E8EEF4; color: var(--color-secondary); }
.card__icon--accent { background: var(--color-primary-light); color: var(--color-accent); }

.grid { display: grid; gap: 1rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.mt-4 { margin-top: 1.5rem; }

/* Forms */
.auth-page { display: grid; place-items: center; width: 100%; }
.auth-card {
    width: min(100%, 420px); background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    padding: 2rem; box-shadow: var(--shadow-md);
}
.auth-card__header { text-align: center; margin-bottom: 1.5rem; }
.auth-card__header h1 { margin: .75rem 0 .25rem; font-size: 1.5rem; }
.auth-card__header p { margin: 0; color: var(--color-text-muted); font-size: .9rem; }
.auth-card__footer { margin-top: 1.5rem; text-align: center; font-size: .875rem; color: var(--color-text-muted); display: flex; justify-content: center; gap: .5rem; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: .375rem; font-weight: 500; font-size: .9rem; }
.form-group input {
    width: 100%; padding: .75rem 1rem; border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); font: inherit; background: #fff;
    transition: border-color .15s;
}
.form-group input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(13,110,110,.15); }
.input-icon { position: relative; }
.input-icon i,
.input-icon svg {
    position: absolute;
    left: .875rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    pointer-events: none;
}
.input-icon input { padding-left: 2.5rem; }
.input--lg { padding: 1rem 1.125rem; font-size: 1.125rem; }
.input--center { text-align: center; letter-spacing: .1em; font-weight: 600; }

/* Özel checkbox — tarayıcı varsayılanı yerine marka temalı kutu */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    display: inline-grid;
    place-items: center;
    vertical-align: middle;
    transition: border-color .15s ease, background .15s ease, box-shadow .15s ease;
}

input[type="checkbox"]::before {
    content: '';
    width: 11px;
    height: 11px;
    transform: scale(0);
    transition: transform .12s ease-in-out;
    background: #fff;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / contain no-repeat;
}

input[type="checkbox"]:checked {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

input[type="checkbox"]:checked::before { transform: scale(1); }

input[type="checkbox"]:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(225, 29, 72, .18);
}

input[type="checkbox"]:disabled {
    opacity: .5;
    cursor: not-allowed;
}

/* Alerts */
.alert {
    display: flex; align-items: flex-start; gap: .625rem;
    padding: .875rem 1rem; border-radius: var(--radius-sm); margin-bottom: 1rem; font-size: .9rem;
}
.alert i,
.alert svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; }
.alert--danger { background: var(--color-danger-bg); color: var(--color-danger); border: 1px solid #FECACA; }
.alert--success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid #A7F3D0; }
.alert--info { background: var(--color-info-bg); color: #1D4ED8; border: 1px solid #BFDBFE; }

.badge {
    display: inline-flex; align-items: center; gap: .375rem;
    padding: .375rem .75rem; border-radius: 999px; font-size: .8rem; font-weight: 600;
}
.badge--primary { background: var(--color-primary-light); color: var(--color-primary); }

.text-muted { color: var(--color-text-muted); }
.text-danger { color: var(--color-danger); }

.page-header { margin-bottom: 1.5rem; }
.page-header h1 { margin: 0 0 .25rem; font-size: 1.5rem; }

.checklist { list-style: none; padding: 0; margin: 1rem 0 0; }
.checklist li { display: flex; align-items: center; gap: .5rem; padding: .375rem 0; }
.checklist i { color: var(--color-success); width: 18px; }

.status-section { margin-top: 2rem; }
.status-row { display: flex; justify-content: space-between; align-items: center; padding: .5rem 0; }
.status-row--ok { color: var(--color-success); }
.status-row--error { color: var(--color-danger); }

.footer { border-top: 1px solid var(--color-border); padding: 1.25rem 0; background: var(--color-surface); }
.footer__inner p { margin: 0; color: var(--color-text-muted); font-size: .875rem; text-align: center; }

.error-page { text-align: center; padding: 2rem 1rem; }
.error-page__icon { color: var(--color-text-muted); margin-bottom: 1rem; }
.error-page__icon i { width: 64px; height: 64px; }
.error-page__icon--danger { color: var(--color-danger); }
.error-detail {
    background: #F1F5F9; padding: 1rem; border-radius: var(--radius-sm);
    text-align: left; overflow-x: auto; font-size: .8rem; margin: 1rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .topnav {
        position: absolute; top: var(--header-height); left: 0; right: 0;
        background: var(--color-surface); border-bottom: 1px solid var(--color-border);
        flex-direction: column; align-items: stretch; padding: 1rem;
        display: none;
    }
    .topnav.is-open { display: flex; }
    .topbar { position: relative; }
    .hero__actions .btn { flex: 1; min-width: 140px; }
    .auth-card { padding: 1.5rem; }
}

@media (max-width: 480px) {
    .main-content { padding: 1.25rem 0 2rem; }
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { width: 100%; }
}

/* QR tarama (public) */
.qr-scan { max-width: 900px; margin: 0 auto; }
.qr-scan__head { text-align: center; margin-bottom: 1.5rem; }
.qr-scan__head h1 { margin: .5rem 0 .25rem; font-size: 1.5rem; }
.qr-scan__head p { color: var(--color-text-muted); margin: 0; }
.qr-scan__grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.qr-scan__stats { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.5rem; }
.qr-scan__stats strong { display: block; font-size: 1.5rem; }
.qr-scan__stats span { font-size: .78rem; color: var(--color-text-muted); }
.qr-scan__foot { text-align: center; margin-top: 2rem; color: var(--color-text-muted); }
.qr-scan--empty h1 { font-size: 1.25rem; margin: 1rem 0 .5rem; }