/* ========================================
   CALC-NAV v2.5 (Sophisticated Style)
   Based on HUB-GLOBAL-NAVI v8.4
   - v2.2: @import → <link> 분리, 캐시 버스팅 추가
   - v2.3: body padding-top 추가, 모바일 드롭다운 수정
   - v2.4: overlay z-index 수정 (999 < nav 1000)
   - v2.5: 모바일 드롭다운 width/padding 수정
   ======================================== */

/* Body padding for fixed nav */
body {
    padding-top: 70px;
}

@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
}

:root {
    --font-ui: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic",
        "Helvetica Neue", Arial, sans-serif;
    --nav-height: 70px;
    --nav-bg: rgba(250, 248, 244, 0.92);
    --nav-text: #4b5563;
    --nav-text-hover: #10b981;
    --nav-border: #e5e7eb;
    --nav-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    /* Stronger shadow per hub-global */
    --brand-color: #1a1a1a;
}

/* Base Reset & Fonts */
.calc-nav,
.calc-nav * {
    font-family: var(--font-ui);
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* prevent zoom on interactive elements */
.calc-nav a,
.calc-nav button {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Navbar Container */
.calc-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--nav-shadow);
    z-index: 1000;
    padding: 0 2rem;
}

.calc-nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0;
    gap: 3rem;
    position: relative;
    justify-content: flex-start;
}

/* Brand */
.calc-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--brand-color);
    flex-shrink: 0;
}

.calc-logo-img {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    object-fit: contain;
}

.calc-brand-text {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: #1a1a1a;
}

/* Desktop Menu */
.calc-nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

.calc-nav-item {
    position: relative;
}

.calc-nav-link {
    color: var(--nav-text);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
    cursor: pointer;
    padding: 0.5rem 0;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    gap: 4px;
}

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

/* Desktop Dropdown (CSS Hover based for simplicity and robustness) */
.calc-dropdown-content {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #ffffff;
    border: 1px solid var(--nav-border);
    border-top: 2px solid var(--nav-text-hover);
    border-radius: 0 0 12px 12px;
    padding: 1rem;
    min-width: 240px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1010;
}

.calc-nav-item:hover .calc-dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.calc-dropdown-title {
    font-size: 0.75rem;
    color: #9ca3af;
    font-weight: 600;
    padding: 6px 10px 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.calc-dropdown-link {
    display: block;
    padding: 8px 10px;
    color: #4b5563;
    font-weight: 500;
    font-size: 0.9rem;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
}

.calc-dropdown-link:hover {
    background: #f3f4f6;
    color: var(--nav-text-hover);
}

.calc-dropdown-link i {
    margin-right: 6px;
    color: var(--nav-text-hover);
    opacity: 0.8;
}

/* Desktop: Hide mobile-only elements */
.calc-mobile-toggle {
    display: none;
}

.calc-nav-link-wrapper {
    display: contents; /* Desktop에서는 wrapper 무시 */
}

/* Mobile Hamburger */
.calc-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.calc-hamburger span {
    width: 24px;
    height: 2px;
    background: #1a1a1a;
    transition: all 0.3s;
}

.calc-hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.calc-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.calc-hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Overlay - z-index를 nav보다 낮게 설정하되 메뉴보다는 낮게 */
.calc-mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999; /* nav(1000)보다 낮게 */
}

.calc-mobile-overlay.active {
    display: block;
}

/* Mobile Menu Drawer */
@media (max-width: 768px) {
    .calc-nav {
        padding: 0;
        height: 60px;
    }

    .calc-nav-container {
        padding: 0 1rem;
    }

    .calc-hamburger {
        display: flex;
        margin-left: auto;
    }

    /* Mobile: Show wrapper and toggle */
    .calc-nav-link-wrapper {
        display: flex;
        width: 100%;
        align-items: center;
    }

    .calc-mobile-toggle {
        display: flex;
    }

    /* Right aligned */

    .calc-nav-menu {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 60%;
        max-width: 240px;
        height: calc(100dvh - 60px);
        background: #111111;
        /* Dark theme for simple mobile menu as seen in hub-global */
        flex-direction: column;
        align-items: flex-start;
        padding: 0;
        gap: 0;
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1010;
        overflow-y: auto;
    }

    .calc-nav-menu.active {
        right: 0;
    }

    .calc-nav-item {
        width: 100%;
    }

    /* Mobile Links (Top Level) */
    /* Mobile Links (Top Level) */
    .calc-nav-link {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.9rem 1.25rem;
        font-size: 0.95rem;
        color: #e5e5e5;
        width: 100%;
        text-align: left;
        border-bottom: 1px solid #262626;
    }

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

    /* Mobile Toggle Button */
    .calc-mobile-toggle {
        background: none;
        border: none;
        padding: 0.5rem;
        color: #9ca3af;
        font-size: 1.2rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .calc-mobile-toggle::after {
        content: '\203A';
        /* Chevron right */
        display: block;
        transform: rotate(90deg);
        transition: transform 0.3s;
    }

    .calc-nav-item.active .calc-mobile-toggle::after {
        transform: rotate(270deg);
    }

    /* Mobile Dropdown (Inline) */
    .calc-dropdown-content {
        position: static;
        transform: none;
        background: #1a1a1a;
        border: none;
        border-radius: 0;
        padding: 0.5rem 0;
        width: 100%;
        min-width: unset;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        display: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .calc-nav-item.active .calc-dropdown-content,
    .calc-nav-item:hover .calc-dropdown-content {
        display: block;
        max-height: 500px;
        transform: none; /* 데스크탑 hover의 translateX(-50%) 무효화 */
    }

    .calc-dropdown-title {
        color: #6b7280;
        padding: 0.4rem 1.25rem;
        font-size: 0.7rem;
    }

    .calc-dropdown-link {
        display: block;
        padding: 0.6rem 1.25rem;
        color: #a1a1aa;
        font-size: 0.85rem;
        border-radius: 0;
    }

    .calc-dropdown-link:hover {
        color: var(--nav-text-hover);
        background: rgba(16, 185, 129, 0.1);
    }

    .calc-dropdown-link i {
        font-size: 0.85rem;
        margin-right: 8px;
    }

    /* Mobile: Current page highlighting */
    .calc-nav-link.current {
        color: var(--nav-text-hover);
    }

    .calc-dropdown-link.current {
        color: var(--nav-text-hover);
        font-weight: 600;
    }
}

/* ========================================
   Current Page Highlighting (Desktop)
   ======================================== */
.calc-nav-link.current {
    color: var(--nav-text-hover);
}

.calc-dropdown-link.current {
    background: rgba(16, 185, 129, 0.1);
    color: var(--nav-text-hover);
    font-weight: 600;
}

/* ========================================
   Safe Area (Notch) Support
   ======================================== */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    @media (max-width: 768px) {
        .calc-nav-menu {
            padding-bottom: env(safe-area-inset-bottom);
        }
    }
}