:root {
    --primary: #258dbf;
    --bg: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
}

[data-bs-theme="dark"] {
    --bg: #020617;
    --text: #e5e7eb;
    --muted: #94a3b8;
}

* {
    font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
}

/* NAV */
.navbar {
    backdrop-filter: blur(14px);
    background: rgba(255, 255, 255, 0.6);
    height: 64px;
}

[data-bs-theme="dark"] .navbar {
    background: rgba(2, 6, 23, 0.7);
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(37, 141, 191, 0.25), transparent 40%),
        radial-gradient(circle at 80% 30%, rgba(99, 102, 241, 0.25), transparent 40%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.page-header {
    min-height: 36vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: visible;
}

.page-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(37, 141, 191, 0.32), transparent 60%),
        radial-gradient(circle at 80% 30%, rgba(99, 102, 241, 0.28), transparent 60%);
    z-index: 0;

    /* ASIL OLAY */
    mask-image: linear-gradient(to bottom,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 55%,
            rgba(0, 0, 0, 0) 100%);

    -webkit-mask-image: linear-gradient(to bottom,
            rgba(0, 0, 0, 1) 0%,
            rgba(0, 0, 0, 1) 55%,
            rgba(0, 0, 0, 0) 100%);
}

.page-header .container {
    position: relative;
    z-index: 1;
}

/* PHONE */
.phone {
    position: relative;
    width: 300px;
    border-radius: 40px;
    padding: 14px;
    background: linear-gradient(145deg, #0f172a, #020617);
    box-shadow: 0 40px 80px rgba(0, 0, 0, .4);
}

.phone::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 42px;
    pointer-events: none;
}

.phone-screen {
    border-radius: 28px;
    overflow: hidden;
}

.phone img {
    width: 100%;
    display: block;
}

[data-bs-theme="dark"] .phone {
    background: linear-gradient(145deg,
            #0b1220,
            #020617);

    border: 1px solid rgba(255, 255, 255, 0.08);

    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 40px 80px rgba(0, 0, 0, 0.9),
        0 0 40px rgba(37, 141, 191, 0.35);
}

[data-bs-theme="dark"] .phone::after {
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}


/* GLASS CARD */
.glass {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(18px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

[data-bs-theme="dark"] .glass {
    background: rgba(15, 23, 42, 0.6);
    border-color: rgba(255, 255, 255, 0.08);
}

/* FEATURES */
.feature {
    padding: 32px;
    border-radius: 24px;
    transition: all .3s ease;

    /* YENİ */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.feature:hover {
    transform: translateY(-6px);
}

/* BUTTONS */
.btn-primary {
    background: linear-gradient(135deg, #258dbf, #38bdf8);
    border: none;
    border-radius: 14px;
    padding: 14px 24px;
    font-weight: 600;
}

.store img {
    height: 46px;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, .25));
}

/* FOOTER */
footer {
    opacity: .8;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: linear-gradient(135deg, #258dbf, #38bdf8);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 28px;
    box-shadow: 0 10px 30px rgba(37, 141, 191, .4);

}

.feature:hover .feature-icon {
    transform: scale(1.08);
    transition: transform .25s ease;
}

.feature h5 {
    margin-bottom: 10px;
}

.feature p {
    max-width: 260px;
}

.feature:hover {
    transform: translateY(-6px);
}

.feature:hover .feature-icon {
    transform: scale(1.08);
}

.nav-link {
    color: var(--muted);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
}

/* NAVBAR LOGO */
.navbar-brand img {
    height: 40px;
    width: auto;
    transition: all 0.3s ease;
}

/* FOOTER LOGO */
.footer-logo {
    height: 36px;
    width: auto;
    transition: all 0.3s ease;
}

/* LIGHT / DARK toggle */
.logo-dark {
    display: none;
}

[data-bs-theme="dark"] .logo-light {
    display: none;
}

[data-bs-theme="dark"] .logo-dark {
    display: inline-block;
}

.navbar-brand img:hover,
.footer-logo:hover {
    transform: scale(1.05);
}

.footer-logo+span {
    vertical-align: middle;
}

.sustainability-note {
    font-size: 0.75rem;
    opacity: 0.6;
    font-style: italic;
}

:root {
    --primary: #258dbf;
    --bg: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
}

[data-bs-theme="dark"] {
    --bg: #020617;
    --text: #e5e7eb;
    --muted: #94a3b8;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
}

/* NAVBAR */
.navbar {
    backdrop-filter: blur(14px);
    background: rgba(255, 255, 255, 0.6);
    height: 64px;
}

[data-bs-theme="dark"] .navbar {
    background: rgba(2, 6, 23, 0.7);
}

.nav-link {
    color: var(--muted);
}

.nav-link:hover {
    color: var(--text);
}

/* LOGO */
.logo-light {
    display: block;
}

.logo-dark {
    display: none;
}

[data-bs-theme="dark"] .logo-light {
    display: none;
}

[data-bs-theme="dark"] .logo-dark {
    display: block;
}

/* PAGE */
.page-header {
    padding-top: 120px;
    padding-bottom: 48px;
    text-align: center;
}

.content {
    max-width: 920px;
}

h1 {
    font-weight: 700;
    margin-bottom: 16px;
}

h2 {
    margin-top: 48px;
    margin-bottom: 16px;
    font-weight: 600;
}

h3 {
    margin-top: 32px;
    font-weight: 600;
}

h4 {
    margin-top: 24px;
    font-weight: 600;
}

p,
li {
    color: var(--muted);
}

ul {
    padding-left: 20px;
}

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

a:hover {
    text-decoration: underline;
}

/* FOOTER */
footer {
    opacity: .85;
}

.footer-social a {
    margin-right: 12px;
    color: var(--muted);
    font-size: 18px;
}

.footer-social a:hover {
    color: var(--text);
}