:root {
    --primary-color: #69b7ff;
    --primary-hover: #4fa8f5;
    --secondary-color: #4f5d75;
    --background-start: #dff5ff;
    --background-middle: #edfaff;
    --background-end: #ffffff;
    --surface-color: rgba(255, 255, 255, 0.9);
    --surface-soft: rgba(255, 255, 255, 0.74);
    --text-color: #2c3e50;
    --muted-text: #667085;
    --border-color: rgba(105, 183, 255, 0.18);
    --shadow-color: rgba(120, 170, 255, 0.15);
}

body.dark-mode {
    --primary-color: #8dccff;
    --primary-hover: #6cbcff;
    --secondary-color: #d4d9df;
    --background-start: #17191d;
    --background-middle: #22262c;
    --background-end: #2d3239;
    --surface-color: rgba(38, 42, 49, 0.94);
    --surface-soft: rgba(41, 45, 51, 0.88);
    --text-color: #f4f7fa;
    --muted-text: #cbd2da;
    --border-color: rgba(141, 204, 255, 0.16);
    --shadow-color: rgba(0, 0, 0, 0.28);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: "Poppins", Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--background-start), var(--background-middle), var(--background-end));
    transition: background 0.3s ease, color 0.3s ease;
}
img { display: block; max-width: 100%; }
button, a, input, textarea { font: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 3px solid rgba(105, 183, 255, 0.55);
    outline-offset: 4px;
}
main {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
    padding: 64px 0;
    flex: 1;
}

.kontakt-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 8px 8%;
    background: rgba(255, 255, 255, 0.86);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(14px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}
body.dark-mode .kontakt-header {
    background: rgba(30, 33, 38, 0.92);
    border-bottom-color: rgba(141, 204, 255, 0.08);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
}
.brand, .main-nav a, .footer-links a { text-decoration: none; }
.brand-name { color: var(--primary-color); font-size: 30px; font-weight: 800; }
.main-nav a {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    color: var(--secondary-color);
    font-weight: 600;
    transition: color 0.3s ease, transform 0.3s ease;
}
.main-nav a:hover { color: var(--primary-color); transform: translateX(-3px); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.logo-container img {
    width: 66px;
    height: 66px;
    object-fit: cover;
    border-radius: 14px;
    box-shadow: 0 10px 28px var(--shadow-color);
    transition: transform 0.3s ease;
}
.logo-container img:hover { transform: translateY(-3px); }
#dark-mode-toggle {
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: var(--primary-color);
    background: #eef8ff;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
    transition: 0.3s ease;
}
#dark-mode-toggle:hover {
    transform: translateY(-3px) scale(1.06);
    background: #dcefff;
    box-shadow: 0 10px 25px rgba(105, 183, 255, 0.25);
}
body.dark-mode #dark-mode-toggle { color: #ffd76a; background: #3a4049; }

.content-section {
    position: relative;
    overflow: hidden;
    padding: 60px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    box-shadow: 0 22px 60px var(--shadow-color);
    backdrop-filter: blur(16px);
}
.contact-glow {
    position: absolute;
    top: -140px;
    left: -110px;
    width: 340px;
    height: 340px;
    background: rgba(105, 183, 255, 0.16);
    border-radius: 50%;
    filter: blur(28px);
    pointer-events: none;
}
.contact-heading {
    position: relative;
    z-index: 1;
    max-width: 760px;
    margin: 0 auto 46px;
    text-align: center;
}
.section-label {
    display: block;
    margin-bottom: 10px;
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.contact-heading h1 {
    margin-bottom: 16px;
    color: var(--text-color);
    font-size: clamp(38px, 6vw, 62px);
    line-height: 1.08;
}
.contact-heading p { color: var(--muted-text); font-size: 17px; }
.contact-layout {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: stretch;
}
.contact-info { display: flex; flex-direction: column; justify-content: space-between; gap: 28px; }
.contact-details { display: grid; gap: 16px; }
.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--surface-soft);
    border: 1px solid var(--border-color);
    border-radius: 18px;
}
.contact-detail > i {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    background: rgba(105, 183, 255, 0.12);
    border-radius: 14px;
}
.contact-detail span {
    color: var(--secondary-color);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.contact-detail p { margin-top: 2px; color: var(--muted-text); font-size: 15px; }
.contact-socials {
    padding: 20px;
    background: var(--surface-soft);
    border: 1px solid var(--border-color);
    border-radius: 18px;
}
.contact-socials p { margin-bottom: 14px; color: var(--muted-text); font-size: 14px; }
.social-links { display: flex; flex-wrap: wrap; gap: 12px; }
.social-links a {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    background: rgba(105, 183, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 13px;
    text-decoration: none;
    transition: 0.3s ease;
}
.social-links a:hover { color: white; background: var(--primary-color); transform: translateY(-3px); }

.contact-form {
    padding: 34px;
    background: var(--surface-soft);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: 0 20px 50px var(--shadow-color);
    backdrop-filter: blur(14px);
}
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group + .form-group { margin-top: 20px; }
.form-group label { color: var(--secondary-color); font-size: 14px; font-weight: 700; }
.input-wrapper { position: relative; }
.input-wrapper > i {
    position: absolute;
    top: 50%;
    left: 16px;
    color: var(--primary-color);
    transform: translateY(-50%);
    pointer-events: none;
}
.textarea-wrapper > i { top: 20px; transform: none; }
.input-wrapper input, .input-wrapper textarea {
    width: 100%;
    padding: 15px 16px 15px 48px;
    color: var(--text-color);
    background: rgba(244, 250, 255, 0.9);
    border: 1px solid transparent;
    border-radius: 14px;
    outline: none;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.input-wrapper textarea { min-height: 180px; resize: vertical; padding-top: 16px; }
.input-wrapper input::placeholder, .input-wrapper textarea::placeholder { color: #98a2b3; }
.input-wrapper input:focus, .input-wrapper textarea:focus {
    background: #ffffff;
    border-color: rgba(105, 183, 255, 0.5);
    box-shadow: 0 0 0 4px rgba(105, 183, 255, 0.14);
}
body.dark-mode .input-wrapper input, body.dark-mode .input-wrapper textarea {
    color: var(--text-color);
    background: #353b44;
}
body.dark-mode .input-wrapper input:focus, body.dark-mode .input-wrapper textarea:focus {
    background: #3c434d;
    border-color: rgba(141, 204, 255, 0.45);
}
body.dark-mode .input-wrapper input::placeholder, body.dark-mode .input-wrapper textarea::placeholder { color: #929dac; }

.btn {
    min-height: 52px;
    padding: 14px 24px;
    border: 0;
    border-radius: 14px;
    font-weight: 700;
    cursor: pointer;
}
.btn-primary {
    color: #ffffff;
    background: var(--primary-color);
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(105, 183, 255, 0.3);
}
.contact-submit {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}
.contact-submit i { transition: transform 0.3s ease; }
.contact-submit:hover i { transform: translateX(4px); }
.form-status {
    min-height: 24px;
    margin-top: 12px;
    color: var(--muted-text);
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}
.form-status.is-info { color: var(--primary-color); }
.form-note { margin-top: 6px; color: var(--muted-text); font-size: 12px; text-align: center; }

.site-footer {
    width: 100%;
    padding: 28px 20px;
    color: var(--muted-text);
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -5px 25px var(--shadow-color);
}
.footer-content {
    width: min(1100px, 100%);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 24px;
    text-align: center;
}
.footer-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: var(--secondary-color); font-weight: 600; transition: color 0.3s ease; }
.footer-links a:hover { color: var(--primary-color); }

@media (max-width: 860px) {
    .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 650px) {
    main { width: min(100% - 24px, 1160px); padding: 36px 0; }
    .kontakt-header { padding: 10px 16px; }
    .brand-name { font-size: 24px; }
    .main-nav { display: none; }
    .logo-container img { width: 52px; height: 52px; }
    #dark-mode-toggle { width: 44px; height: 44px; }
    .content-section { padding: 34px 20px; border-radius: 24px; }
    .contact-heading { margin-bottom: 34px; }
    .contact-heading h1 { font-size: clamp(34px, 10vw, 46px); }
    .contact-form { padding: 24px 20px; }
    .contact-detail { padding: 17px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}