/* SIE Navigation Component Styles */
/* Shared navigation styles for all SIE study material pages */
/* Requires main.css to be loaded first for CSS variables and night mode */

/* Navigation Bar */
.sie-nav-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--fh-white);
    border-top: 2px solid var(--fh-gray-200);
    box-shadow: 0 -2px 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: var(--fh-space-md) var(--fh-space-xl);
}

.sie-nav-bar__content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--fh-space-lg);
}

/* Navigation Buttons */
.sie-nav-button {
    display: flex;
    align-items: center;
    gap: var(--fh-space-sm);
    padding: var(--fh-space-sm) var(--fh-space-md);
    background: var(--fh-gray-100);
    border: 1px solid var(--fh-gray-300);
    border-radius: 4px;
    text-decoration: none;
    color: var(--fh-gray-700);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    min-width: 120px;
}

.sie-nav-button:hover:not(.sie-nav-button--disabled) {
    background: var(--fh-navy);
    color: var(--fh-white);
    border-color: var(--fh-navy);
    text-decoration: none;
}

.sie-nav-button--disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}

.sie-nav-button--prev {
    justify-content: flex-start;
}

.sie-nav-button--next {
    justify-content: flex-end;
}

/* Chapter/Section Selector */
.sie-chapter-selector {
    flex: 1;
    max-width: 500px;
    display: flex;
    align-items: center;
    gap: var(--fh-space-md);
}

.sie-chapter-selector__label {
    font-size: 0.875rem;
    color: var(--fh-gray-600);
    font-weight: 600;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sie-chapter-selector__dropdown {
    flex: 1;
    position: relative;
}

.sie-chapter-selector__toggle {
    width: 100%;
    padding: var(--fh-space-sm) var(--fh-space-md);
    background: var(--fh-white);
    border: 2px solid var(--fh-gray-300);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.sie-chapter-selector__toggle:hover {
    border-color: var(--fh-sage);
}

.sie-chapter-selector__current {
    font-weight: 600;
    color: var(--fh-gray-900);
    font-size: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Chapter Menu Dropdown */
.sie-chapter-selector__menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--fh-white);
    border: 2px solid var(--fh-gray-300);
    border-radius: 4px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    z-index: 1001;
}

.sie-chapter-selector__menu.open {
    display: block;
}

/* Chapter Groups in Menu */
.sie-chapter-group {
    border-bottom: 1px solid var(--fh-gray-200);
}

.sie-chapter-group:last-child {
    border-bottom: none;
}

.sie-chapter-group__header {
    padding: var(--fh-space-sm) var(--fh-space-md);
    background: var(--fh-gray-100);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fh-gray-600);
}

.sie-chapter-group__sections {
    background: var(--fh-white);
}

/* Section Options in Menu */
.sie-section-option {
    display: flex;
    align-items: center;
    gap: var(--fh-space-sm);
    padding: var(--fh-space-sm) var(--fh-space-md);
    padding-left: var(--fh-space-xl);
    color: var(--fh-gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--fh-gray-100);
    transition: background 0.2s ease;
    position: relative;
    font-size: 0.875rem;
}

.sie-section-option:hover:not(.sie-section-option--locked) {
    background: var(--fh-gray-100);
}

.sie-section-option--current {
    background: var(--fh-sage);
    color: var(--fh-white);
    font-weight: 600;
}

.sie-section-option--current:hover {
    background: var(--fh-sage);
}

.sie-section-option--locked {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.sie-section-option__number {
    font-family: var(--fh-font-mono);
    font-size: 0.75rem;
    color: var(--fh-sage);
    min-width: 2.5rem;
}

.sie-section-option--current .sie-section-option__number {
    color: var(--fh-white);
}

.sie-section-option__title {
    flex: 1;
}

.sie-section-option__lock {
    position: absolute;
    right: var(--fh-space-md);
    top: 50%;
    transform: translateY(-50%);
}

/* Section Navigation Dots */
.sie-section-nav {
    display: flex;
    gap: var(--fh-space-xs);
    align-items: center;
}

/* Dots for internal page sections */
.sie-section-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--fh-gray-300);
    transition: all 0.2s ease;
    cursor: pointer;
    position: relative;
}

.sie-section-dot:hover {
    background: var(--fh-sage);
    transform: scale(1.5);
}

.sie-section-dot.active {
    background: var(--fh-sage);
    transform: scale(1.3);
}

/* Dots for linking to other sections */
.sie-section-link-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--fh-gray-300);
    transition: all 0.2s ease;
    cursor: pointer;
    display: inline-block;
    text-decoration: none;
}

.sie-section-link-dot:hover:not(.locked) {
    background: var(--fh-sage);
    transform: scale(1.5);
}

.sie-section-link-dot.active {
    background: var(--fh-sage);
    transform: scale(1.3);
}

.sie-section-link-dot.locked {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Scrollbar Styling for Menu */
.sie-chapter-selector__menu::-webkit-scrollbar {
    width: 8px;
}

.sie-chapter-selector__menu::-webkit-scrollbar-track {
    background: var(--fh-gray-100);
    border-radius: 4px;
}

.sie-chapter-selector__menu::-webkit-scrollbar-thumb {
    background: var(--fh-gray-400);
    border-radius: 4px;
}

.sie-chapter-selector__menu::-webkit-scrollbar-thumb:hover {
    background: var(--fh-gray-500);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sie-nav-bar {
        padding: var(--fh-space-sm) var(--fh-space-md);
    }

    .sie-nav-bar__content {
        flex-wrap: wrap;
        gap: var(--fh-space-sm);
    }

    .sie-chapter-selector {
        order: -1;
        flex: 100%;
        max-width: 100%;
        margin-bottom: var(--fh-space-xs);
    }

    .sie-chapter-selector__label {
        display: none;
    }

    .sie-nav-button {
        min-width: auto;
        flex: 1;
        padding: var(--fh-space-xs) var(--fh-space-sm);
        font-size: 0.75rem;
    }

    .sie-section-nav {
        display: none;
    }

    .sie-chapter-selector__menu {
        max-height: 300px;
    }

    .sie-section-option {
        padding: var(--fh-space-xs) var(--fh-space-sm);
        padding-left: var(--fh-space-lg);
        font-size: 0.8125rem;
    }
}

/* Tooltip for dots */
.sie-section-dot[title]:hover::after,
.sie-section-link-dot[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--fh-gray-900);
    color: var(--fh-white);
    padding: var(--fh-space-xs) var(--fh-space-sm);
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    pointer-events: none;
    z-index: 1002;
}

/* Ensure body has bottom padding for fixed nav */
body {
    padding-bottom: 80px;
}