/* css/header.css */

/* Styles specific to the header section */

.header { 
    background: var(--bg-header, rgba(255, 255, 255, 0.95)); 
    backdrop-filter: blur(8px); 
    -webkit-backdrop-filter: blur(8px); 
    border-bottom: 1px solid var(--border-color); 
    padding: 0.75rem 0; 
    position: sticky; 
    top: 0; 
    z-index: 100; 
    transition: background-color 0.3s, border-color 0.3s; 
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}
html[data-theme="dark"] .header {
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.header .container { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 0 var(--space-md); 
}

.logo-link { 
    display: inline-block; 
    flex-shrink: 0; 
    text-decoration: none; /* Ensure no underline from global a */
}

/* NEW: Styles for the text-based logo with animation */
#logo-text { 
    font-family: var(--font-primary);
    font-size: 1.8rem; 
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1; 
    display: inline-block; /* Essential for transforms to work */
    padding: 0.2rem 0; 
    letter-spacing: -0.02em; /* Subtle initial spacing */
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94); /* Smooth transition for hover effects */
    position: relative; /* For pseudo-elements if needed */
    overflow: hidden; /* Hide overflow of animation */
}

/* Interactive Animation on Hover for #logo-text */
.logo-link:hover #logo-text {
    transform: scale(1.05) translateY(-2px); /* Slight lift and scale */
    color: var(--accent-color); /* Change color on hover */
    letter-spacing: 0.05em; /* Expand letter spacing */
}

/* Optional: Subtle wave or glow effect on hover */
.logo-link:hover #logo-text::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent); /* Light shimmer */
    transition: left 0.6s ease-out;
}

.logo-link:hover #logo-text::before {
    left: 100%; /* Move shimmer across */
}


.main-nav { 
    margin-left: auto; 
}
.main-nav ul { 
    list-style: none; 
    display: flex; 
    gap: 1.5rem; 
    padding: 0; 
    margin: 0; 
}
.main-nav a { 
    text-decoration: none; 
    color: var(--text-secondary); 
    font-weight: 500; 
    transition: color 0.2s, background-color 0.2s, padding 0.2s; 
    padding: 0.5rem 0.75rem; 
    border-radius: 6px; 
}
.main-nav a:hover { 
    color: var(--text-primary); 
    background-color: var(--bg-highlight); 
}
.main-nav a.active-link { 
    color: var(--accent-color);
    font-weight: 600;
}


.header-actions { 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
    margin-left: 1.5rem; 
}

/* Theme Toggle (Feather Icons) */
.theme-toggle {
    background: none; border: none; cursor: pointer;
    padding: 0;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-primary);
    position: relative;
    width: 40px;
    height: 40px;
    overflow: hidden; 
    flex-shrink: 0; 
    border-radius: 8px; 
    transition: background-color 0.2s; 
}
.theme-toggle:hover {
    background-color: var(--bg-highlight); 
}
.theme-toggle svg {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px; 
    height: 24px;
    transform-origin: center;
    transition: opacity 0.3s ease-out, transform 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55); 
}

.theme-toggle .sun {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}
.theme-toggle .moon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg) scale(0.5);
}

html[data-theme="dark"] .theme-toggle .sun {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.5);
}
html[data-theme="dark"] .theme-toggle .moon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1); 
}

/* Hamburger Menu Toggle */
.menu-toggle {
    display: none; 
    flex-direction: column;
    justify-content: space-around;
    width: 28px;
    height: 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    position: relative; 
    z-index: 101; 
}
.menu-toggle .bar {
    height: 3px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 10px;
    transition: all .3s ease-in-out;
}

/* Hamburger Menu Animation */
.header.nav-open .menu-toggle .bar:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}
.header.nav-open .menu-toggle .bar:nth-child(2) {
    opacity: 0;
}
.header.nav-open .menu-toggle .bar:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}


/* Responsive Header */
@media (max-width: 992px) { 
    .main-nav {
        display: none; 
        position: absolute;
        top: 100%; 
        left: 0;
        right: 0; 
        background-color: var(--bg-header, rgba(255, 255, 255, 0.95));
        border-bottom: 1px solid var(--border-color);
        padding: 0.5rem 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        z-index: 90;
        transition: transform 0.3s ease-out; 
        transform: translateY(-100%); 
    }
    .main-nav.active { 
        display: block; 
        transform: translateY(0); 
    }
    .main-nav ul {
        flex-direction: column;
        padding: 0 1.5rem; 
        gap: 0.5rem;
    }
    .main-nav ul li a {
        display: block;
        padding: 0.75rem 0.5rem; 
    }

    .header-actions { 
        margin-left: auto; 
    }
    .menu-toggle {
        display: flex; 
    }
}

@media (max-width: 768px) { 
    .header-actions {
        gap: 0.5rem; 
    }
    .main-nav ul {
        padding: 0 1rem; 
    }
}
@media (max-width: 480px) {
    .header .container {
        padding: 0 var(--space-xs); 
    }
    .main-nav ul { 
        padding: 0 1rem; 
    }
    .header-actions { 
        margin-left: 0.5rem; 
        gap: 0.25rem; 
    } 
    .theme-toggle { 
        width: 36px; 
        height: 36px; 
    } 
    .theme-toggle svg { 
        width: 20px; 
        height: 20px; 
    }
    #logo-text { /* Adjust text logo size for very small screens */
        font-size: 1.6rem; 
    }
}