/* --- 1. Variables --- */
:root {
    --book-brown: #8B4513;
    --deep-brown: #5d2e0d;
    --paper-bg: #fdfdfb;
    --top-bar-bg: #f8f9fa;
    --text-main: #2c2c2c;
    --border-color: #eee5d8;
}

/* --- 2. Global Styles --- */
html, body {
    height: 100%;
    overflow: hidden;
}

body {
    background-color: var(--paper-bg) !important;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif !important;
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    margin: 0;
}

h1, h2, h3, h4, .text-custom-brown {
    color: var(--book-brown) !important;
    font-family: 'Geist Sans', sans-serif !important;
    font-weight: 700;
    letter-spacing: -0.02em;
}

code, pre {
    font-family: 'JetBrains Mono', monospace !important;
    background-color: rgba(0, 0, 0, 0.05);
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 0.9em;
}

section h3 {
    border-bottom: 2px solid #eee5d8 !important;
    letter-spacing: 1px;
}

/* --- 3. Layout & Containers --- */
main.d-flex {
    height: 100vh;
    overflow: hidden;
}

.main-content {
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.top-bar {
    height: 45px;
    min-height: 45px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--top-bar-bg);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 10;
    margin-bottom: 1.5rem;
}

.breadcrumb-text {
    font-size: 0.85rem;
    color: #888;
}

.breadcrumb-text b {
    color: var(--text-main);
    font-weight: 500;
}

/* --- 4. Sidebar Styles --- */
.sidebar {
    height: 100vh;
    overflow-y: auto;
    width: 280px;
}

.sidebar.bg-light {
    background-color: #f8f5ee !important;
    border-right: 1px solid var(--border-color);
}

.sidebar .nav-pills .nav-link.active {
    background-color: var(--book-brown) !important;
    color: white !important;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.sidebar .nav-pills .nav-link:hover:not(.active) {
    background-color: #ede2cf !important;
    color: var(--book-brown) !important;
    transform: translateX(5px);
    transition: all 0.2s ease;
}

/* --- 5. Navigation & Links --- */
.nav-link.active-custom {
    background-color: #8B4513 !important;
    color: white !important;
    box-shadow: 0 4px 6px rgba(139, 69, 19, 0.2);
}

.nav-link:hover:not(.active-custom) {
    background-color: rgba(139, 69, 19, 0.05);
    color: #8B4513 !important;
    opacity: 1 !important;
}

.project-link {
    color: #212529;
    text-decoration: none;
    transition: all 0.25s ease-in-out;
    border-bottom: 1px solid transparent;
}

.project-link:hover {
    color: #8B4513;
    border-bottom: 1px solid rgba(139, 69, 19, 0.3);
}

.dropdown-item:hover {
    background-color: var(--book-brown) !important;
    color: #fff !important;
}

/* --- 6. Buttons & Interaction --- */
.btn-outline-brown {
    border-color: #8B4513;
    color: #8B4513;
}

.btn-outline-brown:hover {
    background-color: #8B4513;
    color: white;
}

.btn-outline-custom-brown {
    border: 1px solid var(--book-brown) !important;
    color: var(--book-brown) !important;
    background-color: transparent !important;
    display: flex !important;
}

.btn-outline-custom-brown:hover {
    background-color: var(--book-brown) !important;
    color: white !important;
}

/* --- Feature Button Interaction --- */
.feature-btn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 12px;
    border: 1px solid transparent;
    padding: 1.5rem 0;
}

.feature-btn:hover {
    background-color: rgba(139, 69, 19, 0.12);
    transform: translateY(-4px);
    cursor: pointer;
}

.feature-btn:hover i,
.feature-btn:hover p {
    color: var(--deep-brown) !important;
}

.feature-btn[aria-expanded="true"] {
    background-color: #f3ede4;
    border-color: #eee5d8;
    transform: translateY(0);
}

.feature-btn[aria-expanded="true"] i {
    color: var(--book-brown) !important;
}

/* --- 7. Icon Buttons --- */
.contact-icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: white;
    border: 1px solid #eee5d8;
    color: var(--book-brown);
    text-decoration: none;
    transition: all 0.2s ease;
}

.contact-icon-btn:hover {
    background-color: var(--book-brown);
    color: white;
    transform: translateY(-2px);
}

.contact-icon-btn-sm {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f3ede4;
    color: #8B4513;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(139, 69, 19, 0.1);
}

.contact-icon-btn-sm:hover {
    background-color: #8B4513;
    color: #ffffff !important;
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(139, 69, 19, 0.15);
}

.contact-icon-btn-sm i {
    font-size: 1.1rem;
}

/* --- 8. Specific Components --- */
.project-card {
    background-color: #f8f5ee !important;
    border-left: 4px solid var(--book-brown) !important;
    border-radius: 0 8px 8px 0;
    transition: box-shadow 0.2s ease, background-color 0.2s ease;
}

.skills-sidebar {
    background-color: white;
    border: 1px solid #eee5d8 !important;
}

.badge.bg-dark {
    background-color: var(--deep-brown) !important;
}

.badge.bg-secondary {
    background-color: #a69685 !important;
}

.custom-list {
    list-style: none;
    padding-left: 0;
}

.custom-list li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.custom-list li i {
    margin-right: 10px;
    color: var(--book-brown);
    font-size: 0.85rem;
    padding-top: 4px;
}

/* --- 9. Utility Classes --- */
.bg-custom-brown {
    background-color: var(--book-brown) !important;
}

.border-custom-brown {
    border-color: var(--book-brown) !important;
}