/**
 * ============================================================
 * Author:    DARK-MASTER
 * Studio:    DARK DIGITAL STUDIO
 * Site:      dark-digital-studio.com
 * Email:     Service.Dark.Digital.studio@gmail.com
 * WhatsApp:  +905378664534
 * Telegram:  https://t.me/DARK_Digital_Studio
 * GitHub:    github.com/DARK-MASTER-0
 *
 * Copyright (c) 2018-2026 Dark Digital Studio. All Rights Reserved.
 * Unauthorized copying, distribution, or use of this software,
 * in whole or in part, is strictly prohibited without prior
 * written permission from the author.
 * ============================================================
 */
/* ========================================================================
   Header & Navigation
   ======================================================================== */
.site-header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: min(1100px, 94vw);
    z-index: 1000;
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-soft);
    transition: background 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), width 0.4s ease, box-shadow 0.4s ease;
}

.site-header[data-condensed="true"] {
    transform: translate(-50%, -45%);
    background: rgba(255, 255, 255, 0.75);
    box-shadow: 0 12px 30px -12px rgba(12, 31, 47, 0.35);
}

html[data-theme="dark"] .site-header[data-condensed="true"] {
    background: rgba(4, 12, 28, 0.75);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 32px;
    gap: 32px;
    transition: transform 0.4s ease, padding 0.4s ease;
}

.site-header[data-condensed="true"] .header-inner {
    transform: translateY(12px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    font-weight: 700;
    color: var(--color-text);
}

.brand img {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    padding: 6px;
    background: linear-gradient(135deg, rgba(13, 125, 220, 0.18), rgba(111, 199, 255, 0.26));
    box-shadow: inset 0 0 0 1px var(--layer-glass-border-strong);
}

html[data-theme="dark"] .brand img {
    background: linear-gradient(135deg, rgba(31, 114, 242, 0.28), rgba(8, 36, 92, 0.6));
    box-shadow: inset 0 0 0 1px rgba(4, 12, 28, 0.6);
}

.brand-wordmark {
    font-size: 1.05rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 28px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    position: relative;
    font-weight: 500;
    color: var(--color-text-soft);
    transition: color 0.3s ease;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
    color: var(--color-text);
}

.main-nav a.is-active {
    color: var(--color-primary);
    font-weight: 600;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
    transform: scaleX(1);
}

.main-nav a.is-active::after {
    transform: scaleX(1);
    background: var(--color-primary);
    height: 2.5px;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1.5px solid rgba(13, 125, 220, 0.25);
    background: rgba(13, 125, 220, 0.06);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: rgba(13, 125, 220, 0.12);
    border-color: rgba(13, 125, 220, 0.4);
    box-shadow: 0 4px 16px -6px rgba(13, 125, 220, 0.3);
}

.nav-toggle:active {
    transform: scale(0.92);
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-primary);
    transition: transform 0.35s cubic-bezier(0.77, 0, 0.175, 1),
                opacity 0.25s ease,
                width 0.25s ease;
    transform-origin: center;
}

.nav-toggle span:nth-child(1) {
    width: 18px;
}

.nav-toggle span:nth-child(2) {
    width: 14px;
    align-self: flex-end;
    margin-right: 2px;
}

.nav-toggle span:nth-child(3) {
    width: 18px;
}

.nav-toggle[aria-expanded="true"] {
    background: rgba(13, 125, 220, 0.14);
    border-color: var(--color-primary);
}

.nav-toggle[aria-expanded="true"] span {
    width: 18px;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    width: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.header-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.theme-toggle {
    flex-shrink: 0;
}