/* ==========================================================================
   ExcelSuperGuru - Shared UI Components
   ========================================================================== */

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

/* ==========================================================================
   Header & Navigation (Updated for Hide/Show on Scroll)
   ========================================================================== */

.site-header {
    position: fixed; /* sticky से बदलकर fixed किया ताकि पूरे पेज पर स्मूथली काम करे */
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(var(--bg-secondary), 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    
    /* स्मूथ एनीमेशन के लिए transition */
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s;
}

/* जब यूजर नीचे स्क्रॉल करेगा (Hide Navbar) */
.site-header.scroll-down {
    transform: translateY(-100%);
}

/* जब यूजर ऊपर स्क्रॉल करेगा (Show Navbar) */
.site-header.scroll-up {
    transform: translateY(0);
    box-shadow: var(--shadow-md); /* स्क्रॉल करते समय हल्का शैडो देने के लिए */
}

/* बॉडी में टॉप पैडिंग ताकि पहला सेक्शन हेडर के पीछे न छुपे */
body {
    padding-top: 70px; 
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-brand span {
    color: var(--excel-green);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--excel-green);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--excel-green);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease-in-out;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* ==========================================================================
   Theme Controller Button
   ========================================================================== */

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--excel-green);
}

.theme-toggle-btn .sun-icon { display: none; }
body.dark-mode .theme-toggle-btn .moon-icon { display: none; }
body.dark-mode .theme-toggle-btn .sun-icon { display: block; }

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--excel-green);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--excel-green-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-muted);
}

/* ==========================================================================
   Cards Structure
   ========================================================================== */

.ui-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.ui-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--excel-green-alpha);
}

.card-icon-wrapper {
    width: 48px;
    height: 48px;
    background-color: var(--excel-green-alpha);
    color: var(--excel-green);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.card-title {
    margin-bottom: 0.75rem;
}

.card-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.card-link {
    font-size: 0.9rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--excel-green);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem 0;
    margin-top: auto;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand-summary p {
    margin-top: 1rem;
    max-width: 320px;
    font-size: 0.95rem;
}

.footer-heading {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--excel-green);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}