/* ============================================
   NAVBAR - Expandable Bubble
   Shared across all pages
   ============================================ */
.navbar {
    --nav-size: clamp(44px, 4vw, 56px);
    position: fixed;
    top: var(--space-md);
    left: var(--space-md);
    z-index: 1000;
    display: flex;
    align-items: center;
    height: var(--nav-size);
    width: var(--nav-size);
    border-radius: calc(var(--nav-size) / 2);
    background: linear-gradient(135deg, rgba(30, 30, 30, 0.95) 0%, rgba(20, 20, 20, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.navbar:hover {
    width: min(clamp(520px, 65vw, 920px), calc(100vw - var(--space-lg)));
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
}

@media (min-width: 769px) {
    .navbar {
        --nav-size: clamp(51px, 4.6vw, 64px);
        width: max-content;
        max-width: var(--nav-size);
        transition: max-width 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
    }

    .navbar:hover {
        width: max-content;
        max-width: calc(100vw - var(--space-lg));
    }
}

.navbar-inner {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 0 var(--space-sm);
    width: 100%;
    white-space: nowrap;
}

.nav-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: calc(var(--nav-size) * 0.71);
    height: calc(var(--nav-size) * 0.71);
    font-weight: 800;
    font-size: clamp(0.85rem, 1vw, 1rem);
    letter-spacing: -0.02em;
    color: var(--white);
    text-decoration: none;
    flex-shrink: 0;
    margin-left: -8px;
    transition: transform 0.3s ease;
}

.navbar:hover .nav-logo {
    transform: scale(1.05);
    margin-left: 0;
}

.nav-divider {
    width: 1px;
    max-width: 0;
    height: 24px;
    background: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.15) 50%, transparent 100%);
    opacity: 0;
    flex-shrink: 0;
    overflow: hidden;
    transition: opacity 0.3s ease 0.1s, max-width 0.3s ease 0.1s;
}

.navbar:hover .nav-divider {
    opacity: 1;
    max-width: 1px;
}

.nav-links {
    display: flex;
    gap: var(--space-md);
    max-width: 0;
    overflow: hidden;
    list-style: none;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.4s ease 0.1s, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1) 0.1s, max-width 0.4s ease 0.1s;
    pointer-events: none;
}

.navbar:hover .nav-links {
    max-width: 560px;
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.nav-links li {
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.navbar:hover .nav-links li:nth-child(1) { opacity: 1; transform: translateX(0); transition-delay: 0.12s; }
.navbar:hover .nav-links li:nth-child(2) { opacity: 1; transform: translateX(0); transition-delay: 0.16s; }
.navbar:hover .nav-links li:nth-child(3) { opacity: 1; transform: translateX(0); transition-delay: 0.20s; }
.navbar:hover .nav-links li:nth-child(4) { opacity: 1; transform: translateX(0); transition-delay: 0.24s; }
.navbar:hover .nav-links li:nth-child(5) { opacity: 1; transform: translateX(0); transition-delay: 0.28s; }

.nav-links a {
    display: inline-block;
    font-weight: 500;
    font-size: clamp(0.7rem, 0.9vw, 0.85rem);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
    padding: var(--space-xs) 0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-links a.active::after { transform: scaleX(1); }

.navbar::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: var(--nav-size);
    height: var(--nav-size);
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
    pointer-events: none;
    animation: navPulse 3s ease-in-out infinite;
}

.navbar:hover::before { animation: none; opacity: 0; }

@keyframes navPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0; }
    50% { transform: translate(-50%, -50%) scale(1.4); opacity: 0.3; }
}

/* Theme Selector */
.theme-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 0;
    max-width: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.4s ease 0.2s, transform 0.4s ease 0.2s, max-width 0.4s ease 0.2s, margin-left 0.4s ease 0.2s;
    pointer-events: none;
}

.navbar:hover .theme-selector {
    margin-left: auto;
    max-width: 260px;
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.theme-divider {
    width: 1px;
    height: 24px;
    background: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.15) 50%, transparent 100%);
    margin-right: 4px;
}

.theme-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.theme-btn:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.theme-btn.active {
    border-color: var(--white);
    transform: scale(1.1);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.2);
}

.theme-btn[data-theme="blush"]  { background: linear-gradient(135deg, #ec4899 50%, #3b82f6 50%); }
.theme-btn[data-theme="forest"] { background: linear-gradient(135deg, #059669 50%, #065f46 50%); }
.theme-btn[data-theme="ember"]  { background: linear-gradient(135deg, #ea580c 50%, #c2410c 50%); }

/* ============================================
   NAVBAR — Above Full HD (> 1920px)
   Scale proportionally with viewport width
   ============================================ */
@media (min-width: 1921px) {
    .navbar {
        --nav-size: clamp(64px, 3.35vw, 130px);
    }

    .nav-logo {
        font-size: clamp(1rem, 0.85vw, 1.8rem);
    }

    .nav-links a {
        font-size: clamp(0.85rem, 0.65vw, 1.4rem);
    }

    .navbar:hover .nav-links {
        max-width: min(50vw, 1100px);
    }

    .lang-toggle {
        padding: clamp(4px, 0.25vw, 8px);
    }

    .lang-toggle button {
        font-size: clamp(0.7rem, 0.6vw, 1.6rem);
        padding: clamp(5px, 0.45vw, 16px) clamp(10px, 0.9vw, 32px);
    }
}

/* ============================================
   NAVBAR RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .navbar {
        top: var(--space-sm);
        left: var(--space-sm);
    }

    .navbar.expanded {
        width: 200px;
        height: auto;
        border-radius: 16px;
        padding-bottom: var(--space-sm);
        box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    }

    .navbar.expanded .navbar-inner { flex-direction: column; align-items: flex-start; gap: 0; padding: var(--space-xs) var(--space-sm); }
    .navbar.expanded .nav-logo { transform: none; margin-left: 0; }
    .navbar.expanded .nav-divider { width: 100%; max-width: 100%; height: 1px; opacity: 0.15; margin: var(--space-xs) 0; }
    .navbar.expanded .nav-links { flex-direction: column; align-items: flex-start; max-width: 200px; gap: var(--space-xs); opacity: 1; transform: translateX(0); pointer-events: auto; }
    .navbar.expanded .nav-links li:nth-child(1) { opacity: 1; transform: translateX(0); transition-delay: 0.08s; }
    .navbar.expanded .nav-links li:nth-child(2) { opacity: 1; transform: translateX(0); transition-delay: 0.12s; }
    .navbar.expanded .nav-links li:nth-child(3) { opacity: 1; transform: translateX(0); transition-delay: 0.16s; }
    .navbar.expanded .nav-links li:nth-child(4) { opacity: 1; transform: translateX(0); transition-delay: 0.20s; }
    .navbar.expanded .nav-links li:nth-child(5) { opacity: 1; transform: translateX(0); transition-delay: 0.24s; }
    .navbar.expanded .theme-divider { display: none; }
    .navbar.expanded .theme-selector { margin: var(--space-xs) 0 0 0; max-width: 200px; opacity: 1; transform: translateX(0); pointer-events: auto; transition-delay: 0.28s; }
}

/* ============================================
   LANGUAGE TOGGLE — fixed top-right, all pages
   ============================================ */
.lang-toggle {
    position: fixed;
    top: var(--space-md);
    right: var(--space-md);
    z-index: 1001;
    display: flex;
    align-items: center;
    gap: 0;
    background: linear-gradient(135deg, rgba(30, 30, 30, 0.95) 0%, rgba(20, 20, 20, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    padding: 4px;
    transition: opacity 0.8s ease, border-color 0.8s ease, box-shadow 0.8s ease;
}

.lang-toggle.idle {
    opacity: 0.50;
    border-color: color-mix(in srgb, var(--accent-1) 18%, transparent);
    box-shadow: none;
    background: linear-gradient(135deg, rgba(10, 10, 10, 0.85) 0%, rgba(8, 8, 8, 0.8) 100%);
}

.lang-toggle.idle button {
    color: color-mix(in srgb, var(--accent-1) 30%, transparent);
}

.lang-toggle.idle button.active {
    background: color-mix(in srgb, var(--accent-1) 10%, transparent);
    color: color-mix(in srgb, var(--accent-1) 55%, transparent);
}

.lang-toggle:hover,
.lang-toggle:focus-within {
    opacity: 1;
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    transition: opacity 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.lang-toggle button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
    padding: 5px 10px;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
    line-height: 1;
}

.lang-toggle button.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.lang-toggle button:hover:not(.active) {
    color: rgba(255, 255, 255, 0.75);
}

@media (max-width: 768px) {
    .lang-toggle {
        top: var(--space-sm);
        right: var(--space-sm);
    }
}

/* ============================================
   FOOTER — shared across all pages
   ============================================ */
.footer {
    background: var(--deep-black);
    color: var(--white);
    padding: var(--space-md) var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    z-index: 2;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-logo {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    letter-spacing: 0.05em;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.footer-logo:hover { opacity: 1; }

.footer-nav {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-nav a {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--white);
    text-decoration: none;
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.footer-nav a:hover { opacity: 1; }