/* ============================================
   Marcus Misicka – Persönliche Webseite
   style.css | Modernes CSS3 mit Variablen
   Mobile-First · Dark Mode standardmäßig
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Farbpalette Dark (Standard) */
    --bg-primary: #0f1117;
    --bg-secondary: #161921;
    --bg-card: #1c2030;
    --bg-card-hover: #242a3e;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0b0;
    --text-muted: #6b7185;
    --accent: #6c9bcf;
    --accent-hover: #8bb4e0;
    --accent-subtle: rgba(108, 155, 207, 0.12);
    --border-color: #2a2f42;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition-speed: 0.3s;

    /* Typografie */
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    /* Layout */
    --max-width: 1100px;
    --header-height: 64px;
}

/* Light Mode Override */
[data-theme="light"] {
    --bg-primary: #f5f6fa;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #eef1f7;
    --text-primary: #1a1d2b;
    --text-secondary: #4f5668;
    --text-muted: #838ba0;
    --accent: #3a6fa8;
    --accent-hover: #2c5a8a;
    --accent-subtle: rgba(58, 111, 168, 0.1);
    --border-color: #dde1ea;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* ---------- Reset & Basis ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-stack);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.7;
    min-height: 100vh;
    transition:
        color var(--transition-speed) ease,
        background-color var(--transition-speed) ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: var(--accent-hover);
}

/* ---------- Container & Layout ---------- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 48px;
    position: relative;
    padding-bottom: 16px;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 48px;
    height: 3px;
    background-color: var(--accent);
    border-radius: 2px;
}

/* ---------- Header / Navigation ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    transition:
        background-color var(--transition-speed) ease,
        border-color var(--transition-speed) ease,
        box-shadow var(--transition-speed) ease;
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    transition: color var(--transition-speed) ease;
}

.logo:hover {
    color: var(--accent);
}

/* Hamburger Toggle */
.nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    position: relative;
    transition: background-color var(--transition-speed) ease;
}

.hamburger::before,
.hamburger::after {
    content: "";
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    position: absolute;
    left: 0;
    transition: transform var(--transition-speed) ease;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg);
    top: 0;
}

/* Hauptnavigation */
.main-nav ul {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 8px;
}

.main-nav > ul > li > a {
    display: block;
    padding: 8px 16px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition:
        color var(--transition-speed) ease,
        background-color var(--transition-speed) ease;
}

.main-nav > ul > li > a:hover {
    color: var(--text-primary);
    background-color: var(--accent-subtle);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-speed) ease;
}

.theme-toggle:hover {
    background-color: var(--accent-subtle);
}

.theme-toggle::before {
    content: "☀️";
    font-size: 1.15rem;
    line-height: 1;
    transition: opacity var(--transition-speed) ease;
}

[data-theme="light"] .theme-toggle::before {
    content: "🌙";
}

/* Mobile Nav (Standard versteckt) */
.main-nav {
    display: none;
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: var(--header-height);
        right: 0;
        width: min(280px, 75vw);
        background-color: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        padding: 24px 20px;
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition:
            transform var(--transition-speed) ease,
            opacity var(--transition-speed) ease,
            visibility var(--transition-speed) ease;
        z-index: 999;
        box-shadow: var(--shadow-lg);
    }

    .main-nav.open {
        display: block;
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }

    .main-nav > ul > li > a {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .nav-toggle {
        display: flex;
    }
}

@media (min-width: 769px) {
    .nav-toggle {
        display: none;
    }
}

/* ---------- Hero Section ---------- */
.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    padding: 60px 20px;
    background:
        linear-gradient(
            180deg,
            rgba(15, 17, 23, 0.95) 0%,
            var(--bg-primary) 100%
        ),
        radial-gradient(
            ellipse at 30% 40%,
            rgba(108, 155, 207, 0.08) 0%,
            transparent 70%
        );
}

[data-theme="light"] .hero {
    background:
        linear-gradient(
            180deg,
            rgba(245, 246, 250, 0.95) 0%,
            var(--bg-primary) 100%
        ),
        radial-gradient(
            ellipse at 30% 40%,
            rgba(58, 111, 168, 0.06) 0%,
            transparent 70%
        );
}

/* ---- Hero Grid (zweispaltig auf Desktop) ---- */
.hero-grid {
    display: flex;
    align-items: center;
    gap: 48px;
    width: 100%;
}

.hero-text-col {
    flex: 1 1 55%;
    text-align: left;
    min-width: 0;
}

.hero-img-col {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.profil-portrait {
    width: 260px;
    height: 340px;
    object-fit: cover;
    object-position: center 35%;
    border-radius: 18px;
    border: 3px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    background-color: var(--bg-secondary);
    transition:
        transform var(--transition-speed) ease,
        box-shadow var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.profil-portrait:hover {
    transform: scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 8px 40px rgba(108, 155, 207, 0.18);
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: clamp(1.05rem, 2.5vw, 1.3rem);
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero-text {
    font-size: clamp(0.95rem, 2vw, 1.08rem);
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 36px;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: clamp(1.05rem, 2.5vw, 1.3rem);
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
}

.hero-text {
    font-size: clamp(0.95rem, 2vw, 1.08rem);
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 36px;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease,
        box-shadow var(--transition-speed) ease,
        transform var(--transition-speed) ease;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 155, 207, 0.35);
    transform: translateY(-1px);
}

/* ---------- Über mich ---------- */
.about {
    background-color: var(--bg-secondary);
}

.about-text p {
    font-size: clamp(0.92rem, 1.8vw, 1.02rem);
    color: var(--text-secondary);
    margin-bottom: 20px;
    max-width: 680px;
}

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

/* ---------- Schwerpunkte / Cards ---------- */
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .hero-grid {
        flex-direction: column-reverse;
        text-align: center;
        gap: 32px;
    }

    .hero-text-col {
        text-align: center;
    }

    .profil-portrait {
        width: 200px;
        height: 260px;
        border-radius: 14px;
    }
}

@media (min-width: 769px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1000px) {
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition:
        transform var(--transition-speed) ease,
        box-shadow var(--transition-speed) ease,
        background-color var(--transition-speed) ease,
        border-color var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    background-color: var(--bg-card-hover);
    border-color: var(--accent);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    display: block;
    line-height: 1;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.card-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ---------- Kontakt ---------- */
.contact {
    background-color: var(--bg-secondary);
    text-align: center;
}

.contact-content {
    max-width: 560px;
    margin: 0 auto;
}

.contact-intro {
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.contact-details {
    font-style: normal;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.email-link {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 600;
    color: var(--accent);
    padding: 14px 28px;
    border: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    transition:
        background-color var(--transition-speed) ease,
        color var(--transition-speed) ease,
        transform var(--transition-speed) ease;
}

.email-link:hover {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 155, 207, 0.3);
    transform: translateY(-1px);
}

.location {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.location::before {
    content: "📍";
}

/* ---------- Footer ---------- */
.site-footer {
    padding: 32px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}

.footer-inner > p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.footer-nav a {
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color var(--transition-speed) ease;
}

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

@media (min-width: 600px) {
    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* ---------- Content Pages (Impressum / Datenschutz) ---------- */
.content-page {
    padding: 80px 0 120px;
}

.page-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.page-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 48px;
}

.impressum-content,
.datenschutz-content {
    max-width: 720px;
}

.impressum-content h2,
.datenschutz-content h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 40px;
    margin-bottom: 12px;
}

.impressum-content h3,
.datenschutz-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 8px;
}

.impressum-content p,
.datenschutz-content p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.impressum-content address,
.datenschutz-content address {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.impressum-content ul,
.datenschutz-content ul {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
    padding-left: 24px;
}

.impressum-content li,
.datenschutz-content li {
    margin-bottom: 4px;
}

.datenschutz-date {
    margin-top: 48px;
    font-size: 0.9rem !important;
}

/* ---------- Back to Top (kleine Hilfe) ---------- */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background-color: var(--accent);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition:
        opacity var(--transition-speed) ease,
        transform var(--transition-speed) ease,
        background-color var(--transition-speed) ease,
        visibility var(--transition-speed) ease;
    z-index: 900;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--accent-hover);
}

@media (min-width: 769px) {
    .back-to-top {
        bottom: 32px;
        right: 32px;
    }
}

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