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

:root {
--bg:         #fafaf8;
--bg-alt:     #f4f3ef;
--bg-card:    #ffffff;
--border:     #e8e6e0;
--border-mid: #d4d1c8;
--text:       #1a1917;
--text-mid:   #4a4844;
--text-soft:  #8a8780;
--accent:     #1a4f3a;
--accent-bg:  #e8f2ed;
--accent-mid: #2d7a58;
--check:      #2d7a58;
--warn-bg:    #fdf8ed;
--warn-border:#e8c97a;
--warn-text:  #7a5c0a;
--note-bg:    #eef4ff;
--note-border:#b8cff5;
--note-text:  #1e3a6e;
--nav-width:  260px;
--font-body:  'DM Sans', sans-serif;
--font-display: 'DM Serif Display', serif;
}

html { scroll-behavior: smooth; }

body {
font-family: var(--font-body);
background: var(--bg);
color: var(--text);
font-size: 15px;
line-height: 1.75;
font-weight: 400;
}

/* ── LAYOUT ── */
.layout {
display: flex;
min-height: 100vh;
}

/* ── SOL NAVİGASYON ── */
.nav {
width: var(--nav-width);
flex-shrink: 0;
position: sticky;
top: 0;
height: 100vh;
overflow-y: auto;
background: var(--bg-card);
border-right: 1px solid var(--border);
padding: 2rem 0 3rem;
display: flex;
flex-direction: column;
}

.nav::-webkit-scrollbar { width: 4px; }
.nav::-webkit-scrollbar-track { background: transparent; }
.nav::-webkit-scrollbar-thumb { background: var(--border-mid); border-radius: 2px; }

.nav-logo {
padding: 0 1.5rem 1.75rem;
border-bottom: 1px solid var(--border);
margin-bottom: 1.25rem;
}

.nav-logo-title {
font-family: var(--font-display);
font-size: 1.25rem;
color: var(--text);
letter-spacing: -0.01em;
display: block;
}

.nav-logo-sub {
font-size: 0.75rem;
color: var(--text-soft);
font-weight: 300;
letter-spacing: 0.06em;
text-transform: uppercase;
margin-top: 2px;
display: block;
}

.nav-section-label {
font-size: 0.68rem;
font-weight: 500;
letter-spacing: 0.1em;
text-transform: uppercase;
color: var(--text-soft);
padding: 0.75rem 1.5rem 0.35rem;
}

.nav a {
display: block;
padding: 0.42rem 1.5rem;
font-size: 0.845rem;
color: var(--text-mid);
text-decoration: none;
border-left: 2px solid transparent;
transition: color 0.15s, border-color 0.15s, background 0.15s;
line-height: 1.4;
}

.nav a:hover {
color: var(--accent);
background: var(--accent-bg);
}

.nav a.active {
color: var(--accent);
border-left-color: var(--accent);
background: var(--accent-bg);
font-weight: 500;
}

/* ── ANA İÇERİK ── */
.content {
flex: 1;
min-width: 0;
padding: 3rem 4rem 6rem;
max-width: 820px;
}

/* ── BÖLÜMLER ── */
.section {
padding-top: 3.5rem;
margin-bottom: 0.5rem;
}

.section:first-of-type {
padding-top: 0;
}

.section-eyebrow {
font-size: 0.72rem;
font-weight: 500;
letter-spacing: 0.1em;
text-transform: uppercase;
color: var(--accent-mid);
margin-bottom: 0.5rem;
display: block;
}

.section h2 {
font-family: var(--font-display);
font-size: 2rem;
font-weight: 400;
color: var(--text);
line-height: 1.2;
letter-spacing: -0.02em;
margin-bottom: 1.25rem;
}

.section h3 {
font-family: var(--font-display);
font-size: 1.25rem;
font-weight: 400;
color: var(--text);
margin-top: 2.25rem;
margin-bottom: 0.75rem;
letter-spacing: -0.01em;
}

.section p {
color: var(--text-mid);
margin-bottom: 1rem;
font-size: 0.93rem;
line-height: 1.8;
}

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

.divider {
border: none;
border-top: 1px solid var(--border);
margin: 2.5rem 0;
}

/* ── HERO BÖLÜMÜ ── */
.hero-section {
padding-bottom: 2.5rem;
border-bottom: 1px solid var(--border);
margin-bottom: 0;
}

.hero-section h1 {
font-family: var(--font-display);
font-size: 2.6rem;
font-weight: 400;
line-height: 1.15;
letter-spacing: -0.025em;
color: var(--text);
margin-bottom: 1.25rem;
}

.hero-section h1 em {
font-style: italic;
color: var(--accent-mid);
}

.hero-lead {
font-size: 1.05rem;
color: var(--text-mid);
line-height: 1.75;
max-width: 580px;
margin-bottom: 1.75rem;
}

.hero-tags {
display: flex;
flex-wrap: wrap;
gap: 0.5rem;
}

.tag {
display: inline-block;
font-size: 0.75rem;
font-weight: 500;
letter-spacing: 0.02em;
padding: 0.3rem 0.75rem;
border-radius: 100px;
background: var(--accent-bg);
color: var(--accent);
border: 1px solid #c2ddd1;
}

/* ── ÖZELLİK KARTLARI ── */
.feature-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 1rem;
margin-top: 1.5rem;
}

.feature-card {
background: var(--bg-card);
border: 1px solid var(--border);
border-radius: 10px;
padding: 1.25rem;
}

.feature-card-icon {
font-size: 1.1rem;
margin-bottom: 0.6rem;
display: block;
color: var(--accent-mid);
}

.feature-card h4 {
font-size: 0.88rem;
font-weight: 500;
color: var(--text);
margin-bottom: 0.35rem;
letter-spacing: -0.01em;
}

.feature-card p {
font-size: 0.8rem;
color: var(--text-soft);
line-height: 1.6;
margin: 0;
}

/* ── CHECK LİSTESİ ── */
.check-list {
list-style: none;
margin-top: 1rem;
}

.check-list li {
display: flex;
align-items: flex-start;
gap: 0.65rem;
padding: 0.45rem 0;
font-size: 0.875rem;
color: var(--text-mid);
border-bottom: 1px solid var(--border);
}

.check-list li:last-child { border-bottom: none; }

.check-list li::before {
content: '';
display: block;
flex-shrink: 0;
width: 16px;
height: 16px;
margin-top: 3px;
background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='7.25' fill='%23e8f2ed' stroke='%232d7a58' stroke-width='0.75'/%3E%3Cpath d='M5 8.25l2 2 4-4' stroke='%232d7a58' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
background-repeat: no-repeat;
background-size: contain;
}

.check-list li strong {
font-weight: 500;
color: var(--text);
}

/* ── İKİ KOLON LISTE ── */
.check-list-2col {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 0 1.5rem;
}

.check-list-2col li {
border-bottom: 1px solid var(--border);
}

/* ── BANNER / KUTUCUKLAR ── */
.banner {
border-radius: 8px;
padding: 1rem 1.25rem;
margin: 1.5rem 0;
font-size: 0.865rem;
line-height: 1.65;
}

.banner-accent {
background: var(--accent-bg);
border-left: 3px solid var(--accent);
color: var(--accent);
}

.banner-accent strong {
color: var(--accent);
font-weight: 500;
}

.banner-note {
background: var(--note-bg);
border-left: 3px solid var(--note-border);
color: var(--note-text);
}

.banner-warn {
background: var(--warn-bg);
border-left: 3px solid var(--warn-border);
color: var(--warn-text);
}

/* ── KARŞILAŞTIRMA / FARK TABLOSU ── */
.compare-table {
width: 100%;
border-collapse: collapse;
font-size: 0.845rem;
margin-top: 1.25rem;
}

.compare-table th {
text-align: left;
font-weight: 500;
font-size: 0.75rem;
letter-spacing: 0.05em;
text-transform: uppercase;
color: var(--text-soft);
padding: 0.5rem 0.75rem;
border-bottom: 1px solid var(--border-mid);
}

.compare-table td {
padding: 0.65rem 0.75rem;
border-bottom: 1px solid var(--border);
color: var(--text-mid);
vertical-align: top;
}

.compare-table tr:last-child td { border-bottom: none; }

.compare-table td:first-child {
font-weight: 500;
color: var(--text);
white-space: nowrap;
width: 36%;
}

.tick { color: var(--check); font-size: 1rem; }
.cross { color: #c0392b; font-size: 1rem; }

/* ── BÜYÜK RAKAM / STAT ── */
.stat-row {
display: flex;
gap: 1.5rem;
margin: 1.5rem 0;
flex-wrap: wrap;
}

.stat-item {
flex: 1;
min-width: 120px;
background: var(--bg-card);
border: 1px solid var(--border);
border-radius: 8px;
padding: 1rem 1.25rem;
text-align: center;
}

.stat-item .num {
font-family: var(--font-display);
font-size: 2rem;
color: var(--accent-mid);
display: block;
line-height: 1.1;
}

.stat-item .label {
font-size: 0.78rem;
color: var(--text-soft);
margin-top: 0.2rem;
display: block;
}

/* ── BÖLÜM AYIRICI ── */
.section-sep {
display: flex;
align-items: center;
gap: 1rem;
margin: 3rem 0 0;
padding-top: 3rem;
border-top: 1px solid var(--border);
}

.section-sep-num {
font-family: var(--font-display);
font-size: 3.5rem;
color: var(--border-mid);
line-height: 1;
flex-shrink: 0;
}

/* ── MOBİL ── */
@media (max-width: 900px) {
.nav { display: none; }
.content { padding: 2rem 1.5rem 4rem; }
.feature-grid { grid-template-columns: 1fr; }
.check-list-2col { grid-template-columns: 1fr; }
.hero-section h1 { font-size: 1.9rem; }
}