:root {
    --black: #0a0a0a;
    --red: #E8192C;
    --red-dark: #b30e1e;
    --white: #ffffff;
    --border: rgba(255,255,255,0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Barlow', sans-serif;
    background: var(--black);
    color: var(--white);
    overflow-x: hidden;
}

/* NAVBAR */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 60px;
    background: rgba(10,10,10,0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s;
}

    nav .logo img {
        height: 42px;
        display: block;
    }

    nav ul {
        display: flex;
        gap: 36px;
        list-style: none;
    }

        nav ul li a {
            color: rgba(255,255,255,0.75);
            text-decoration: none;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            transition: color 0.2s;
        }

            nav ul li a:hover, nav ul li a.active {
                color: var(--red);
            }

    nav .cta-nav {
        background: var(--red);
        color: var(--white);
        padding: 10px 24px;
        font-size: 12px;
        font-weight: 700;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        text-decoration: none;
        border: none;
        cursor: pointer;
        transition: background 0.2s;
    }

        nav .cta-nav:hover {
            background: var(--red-dark);
        }

/* FOOTER */
footer {
    background: #050505;
    border-top: 1px solid var(--border);
    padding: 36px 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

    footer img {
        height: 32px;
        opacity: 0.6;
    }

    footer p {
        font-size: 12px;
        color: rgba(255,255,255,0.25);
        letter-spacing: 0.5px;
    }

    footer ul {
        display: flex;
        gap: 24px;
        list-style: none;
    }

        footer ul li a {
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: rgba(255,255,255,0.3);
            text-decoration: none;
            transition: color 0.2s;
        }

            footer ul li a:hover {
                color: var(--red);
            }

.section-tag {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--red);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

    .section-tag::before {
        content: '';
        width: 28px;
        height: 2px;
        background: var(--red);
    }

.btn-primary {
    background: var(--red);
    color: var(--white);
    padding: 16px 36px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    text-decoration: none;
    transition: background 0.2s, transform 0.2s;
    display: inline-block;
}

    .btn-primary:hover {
        background: var(--red-dark);
        transform: translateY(-2px);
    }

@media (max-width: 900px) {
    nav {
        padding: 16px 24px;
    }

        nav ul {
            display: none;
        }

    footer {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}


/* PAGE HERO */
.page-hero {
    padding: 160px 60px 80px;
    background: #0d0d0d;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

    .page-hero::before {
        content: 'ANALİZLER';
        position: absolute;
        right: 40px;
        top: 50%;
        transform: translateY(-50%);
        font-family: 'Barlow Condensed', sans-serif;
        font-size: 160px;
        font-weight: 900;
        color: rgba(255,255,255,0.025);
        text-transform: uppercase;
        letter-spacing: -4px;
        user-select: none;
        white-space: nowrap;
    }

    .page-hero h1 {
        font-family: 'Barlow Condensed', sans-serif;
        font-size: clamp(48px, 6vw, 80px);
        font-weight: 900;
        text-transform: uppercase;
        line-height: 0.95;
        letter-spacing: -1px;
        margin-bottom: 20px;
    }

        .page-hero h1 em {
            font-style: normal;
            color: var(--red);
        }

    .page-hero p {
        font-size: 17px;
        font-weight: 300;
        line-height: 1.75;
        color: rgba(255,255,255,0.55);
        max-width: 580px;
    }

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.3);
    margin-bottom: 28px;
}

    .breadcrumb a {
        color: rgba(255,255,255,0.3);
        text-decoration: none;
        transition: color 0.2s;
    }

        .breadcrumb a:hover {
            color: var(--red);
        }

    .breadcrumb span {
        color: var(--red);
    }

/* INTRO STRIP */
.intro-strip {
    background: var(--red);
    padding: 48px 60px;
    display: flex;
    align-items: center;
    gap: 60px;
}

.intro-strip-num {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 80px;
    font-weight: 900;
    color: rgba(255,255,255,0.2);
    line-height: 1;
    flex-shrink: 0;
}

.intro-strip p {
    font-size: 18px;
    font-weight: 300;
    line-height: 1.75;
    color: rgba(255,255,255,0.9);
}

    .intro-strip p strong {
        font-weight: 700;
        color: var(--white);
    }

/* ANALYSIS CATEGORIES */
.categories {
    background: var(--black);
    padding: 100px 60px;
}

.categories-header {
    margin-bottom: 64px;
}

    .categories-header h2 {
        font-family: 'Barlow Condensed', sans-serif;
        font-size: 56px;
        font-weight: 900;
        text-transform: uppercase;
        line-height: 1;
    }

        .categories-header h2 span {
            color: var(--red);
        }

    .categories-header p {
        font-size: 15px;
        font-weight: 300;
        color: rgba(255,255,255,0.45);
        margin-top: 12px;
        max-width: 500px;
    }

.cat-block {
    margin-bottom: 4px;
}

.cat-header {
    background: #111;
    padding: 32px 40px;
    display: flex;
    align-items: center;
    gap: 24px;
    cursor: pointer;
    transition: background 0.2s;
    border-left: 3px solid transparent;
}

    .cat-header:hover {
        background: #181818;
        border-left-color: var(--red);
    }

    .cat-header.open {
        background: #181818;
        border-left-color: var(--red);
    }

.cat-icon {
    font-size: 28px;
    width: 52px;
    flex-shrink: 0;
    text-align: center;
}

.cat-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 28px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex: 1;
}

.cat-count {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--red);
    background: rgba(232,25,44,0.1);
    padding: 6px 14px;
}

.cat-arrow {
    font-size: 18px;
    color: rgba(255,255,255,0.3);
    transition: transform 0.3s;
}

.cat-header.open .cat-arrow {
    transform: rotate(90deg);
    color: var(--red);
}

.cat-body {
    background: #0d0d0d;
    display: none;
    padding: 0;
}

    .cat-body.open {
        display: block;
    }

.param-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: rgba(255,255,255,0.04);
}

.param-item {
    background: #0d0d0d;
    padding: 20px 28px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: background 0.2s;
}

    .param-item:hover {
        background: #141414;
    }

.param-name {
    font-size: 14px;
    font-weight: 600;
    color: rgba(255,255,255,0.85);
}

.param-method {
    font-size: 11px;
    font-weight: 400;
    color: rgba(255,255,255,0.3);
    letter-spacing: 0.5px;
}

.cat-desc {
    padding: 28px 40px 0;
    font-size: 14px;
    font-weight: 300;
    line-height: 1.75;
    color: rgba(255,255,255,0.5);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    padding-bottom: 28px;
}

/* PROCESS */
.process {
    background: #0d0d0d;
    padding: 100px 60px;
}

    .process h2 {
        font-family: 'Barlow Condensed', sans-serif;
        font-size: 56px;
        font-weight: 900;
        text-transform: uppercase;
        line-height: 1;
        margin-bottom: 64px;
    }

        .process h2 span {
            color: var(--red);
        }

.process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
    background: rgba(255,255,255,0.04);
}

.process-step {
    background: #0d0d0d;
    padding: 40px 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    transition: background 0.2s;
}

    .process-step:hover {
        background: #141414;
    }

    .process-step::after {
        content: '→';
        position: absolute;
        right: -14px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--red);
        font-size: 20px;
        z-index: 1;
    }

    .process-step:last-child::after {
        display: none;
    }

.step-num {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 52px;
    font-weight: 900;
    color: var(--red);
    line-height: 1;
}

.step-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 20px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.step-desc {
    font-size: 13px;
    font-weight: 300;
    line-height: 1.65;
    color: rgba(255,255,255,0.45);
}

/* STANDARDS */
.standards {
    background: #111;
    padding: 80px 60px;
}

    .standards h2 {
        font-family: 'Barlow Condensed', sans-serif;
        font-size: 48px;
        font-weight: 900;
        text-transform: uppercase;
        line-height: 1;
        margin-bottom: 48px;
    }

        .standards h2 span {
            color: var(--red);
        }

.std-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
    background: rgba(255,255,255,0.05);
}

.std-item {
    background: #111;
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-bottom: 2px solid transparent;
    transition: border-color 0.25s, background 0.25s;
}

    .std-item:hover {
        border-color: var(--red);
        background: #181818;
    }

.std-code {
    font-family: 'Barlow Condensed', sans-serif;
    font-size: 28px;
    font-weight: 900;
    color: var(--red);
}

.std-name {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: rgba(255,255,255,0.7);
}

.std-desc {
    font-size: 12px;
    font-weight: 300;
    color: rgba(255,255,255,0.35);
    line-height: 1.6;
}

/* CTA */
.cta-block {
    background: var(--black);
    padding: 80px 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    border-top: 1px solid var(--border);
}

    .cta-block h2 {
        font-family: 'Barlow Condensed', sans-serif;
        font-size: 48px;
        font-weight: 900;
        text-transform: uppercase;
        line-height: 1;
    }

        .cta-block h2 span {
            color: var(--red);
        }

    .cta-block p {
        font-size: 15px;
        font-weight: 300;
        color: rgba(255,255,255,0.5);
        margin-top: 12px;
    }

@media (max-width: 900px) {
    .page-hero {
        padding: 130px 24px 60px;
    }

        .page-hero::before {
            display: none;
        }

    .intro-strip {
        padding: 40px 24px;
        flex-direction: column;
        gap: 20px;
    }

    .categories, .process, .standards {
        padding: 60px 24px;
    }

    .param-grid {
        grid-template-columns: 1fr 1fr;
    }

    .process-steps {
        grid-template-columns: 1fr;
    }

    .process-step::after {
        display: none;
    }

    .std-grid {
        grid-template-columns: 1fr 1fr;
    }

    .cta-block {
        flex-direction: column;
        padding: 60px 24px;
    }
}