/* =============================================
   Financial Calculators — Main Stylesheet
   Design: Clean Professional Finance
   Fonts: Plus Jakarta Sans + JetBrains Mono
   ============================================= */

/* ---- Design Tokens ---- */
:root {
    --p1: #0A2540;
    --p2: #1A3A5C;
    --p3: #2563EB;
    --accent: #00D4AA;
    --accent2: #F59E0B;
    --accent3: #6366F1;
    --bg: #F7F9FC;
    --bg2: #EFF3F8;
    --surface: #FFFFFF;
    --surface2: #F0F4FA;
    --border: #E1E8F0;
    --border2: #CBD5E1;
    --text: #0A2540;
    --text2: #4A6580;
    --text3: #8BA3BE;
    --navbar-bg: #0A2540;
    --footer-bg: #060F1E;
    --footer-text: #8BA3BE;
    --shadow-sm: 0 1px 4px rgba(10,37,64,0.06), 0 4px 16px rgba(10,37,64,0.06);
    --shadow: 0 4px 20px rgba(10,37,64,0.10), 0 1px 4px rgba(10,37,64,0.06);
    --shadow-lg: 0 8px 40px rgba(10,37,64,0.16);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.2s cubic-bezier(0.4,0,0.2,1);
    --transition-slow: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

[data-bs-theme="dark"] {
    --bg: #060F1E;
    --bg2: #091525;
    --surface: #0D1B2E;
    --surface2: #0A1520;
    --border: #162033;
    --border2: #1E2F44;
    --text: #E8F0FA;
    --text2: #7A9BB8;
    --text3: #4A6580;
    --navbar-bg: #040C18;
    --footer-bg: #020810;
    --shadow-sm: 0 1px 4px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.3s, color 0.3s;
    line-height: 1.65;
    font-size: 15px;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 99px; }

h1,h2,h3,h4,h5,h6 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.2;
    color: var(--text);
}

/* ---- Navbar ---- */
.fc-navbar {
    background: var(--navbar-bg);
    padding: 0.65rem 0;
    z-index: 1050;
    position: sticky;
    top: 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.fc-brand {
    font-size: 1.15rem;
    font-weight: 800;
    color: #ffffff !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.03em;
    text-decoration: none;
    white-space: nowrap;
}

.fc-logo-icon {
    background: linear-gradient(135deg, var(--accent) 0%, #00B894 100%);
    color: var(--p1);
    width: 34px;
    height: 34px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    font-weight: 900;
    box-shadow: 0 4px 12px rgba(0,212,170,0.3);
}

.fc-navbar .nav-link {
    color: rgba(255,255,255,0.68) !important;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
    padding: 0.42rem 0.85rem !important;
    border-radius: 7px;
    letter-spacing: -0.01em;
}

.fc-navbar .nav-link:hover { color: #fff !important; background: rgba(255,255,255,0.08); }

.fc-mega-menu {
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    background: var(--p1);
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    min-width: 220px;
    padding: 0.5rem;
    margin-top: 6px !important;
}

.fc-mega-menu .dropdown-item {
    padding: 0.55rem 0.9rem;
    font-size: 0.86rem;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    border-radius: 8px;
    transition: var(--transition);
}

.fc-mega-menu .dropdown-item:hover {
    background: rgba(0,212,170,0.1);
    color: var(--accent);
}

.fc-search-input {
    border-radius: 8px 0 0 8px;
    border: 1px solid rgba(255,255,255,0.1);
    border-right: none;
    font-size: 0.875rem;
    background: rgba(255,255,255,0.08);
    color: #fff;
    min-width: 190px;
    padding: 0.42rem 0.9rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: var(--transition);
}

.fc-search-input::placeholder { color: rgba(255,255,255,0.35); }
.fc-search-input:focus {
    background: rgba(255,255,255,0.12);
    color: #fff;
    box-shadow: none;
    border-color: rgba(0,212,170,0.4);
    outline: none;
}

.fc-search-btn {
    background: var(--accent);
    color: var(--p1);
    border-radius: 0 8px 8px 0;
    border: none;
    padding: 0.42rem 0.9rem;
    font-weight: 700;
    font-size: 0.875rem;
    transition: var(--transition);
}

.fc-search-btn:hover { background: #00EDBB; }

.fc-theme-toggle {
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.75);
    border: 1px solid rgba(255,255,255,0.1);
    width: 34px; height: 34px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}

.fc-theme-toggle:hover { background: rgba(255,255,255,0.14); color: #fff; }

/* ---- Hero ---- */
.fc-hero {
    background: var(--navbar-bg);
    position: relative;
    overflow: hidden;
    padding: 5.5rem 0 5rem;
}

.fc-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 60% at 75% 45%, rgba(37,99,235,0.22) 0%, transparent 60%),
        radial-gradient(ellipse 50% 70% at 15% 85%, rgba(0,212,170,0.14) 0%, transparent 60%),
        radial-gradient(ellipse 35% 35% at 88% 8%, rgba(99,102,241,0.1) 0%, transparent 60%);
    z-index: 0;
}

.fc-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 64px 64px;
    z-index: 0;
}

.fc-hero > .container { position: relative; z-index: 1; }

.fc-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(0,212,170,0.1);
    border: 1px solid rgba(0,212,170,0.22);
    color: var(--accent);
    border-radius: 99px;
    padding: 0.28rem 0.85rem;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 1.3rem;
    text-transform: uppercase;
}

.fc-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.08;
    color: #fff;
}

.fc-hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent) 0%, #5EEAD4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.fc-hero-sub {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.55);
    max-width: 500px;
    margin-top: 1.2rem;
    line-height: 1.75;
    font-weight: 400;
}

.fc-hero-search { max-width: 530px; margin-top: 2rem; }

.fc-hero-search .form-control {
    border-radius: 12px 0 0 12px;
    border: 1px solid rgba(255,255,255,0.1);
    border-right: none;
    background: rgba(255,255,255,0.07);
    color: #fff;
    padding: 0.85rem 1.25rem;
    font-size: 0.93rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

.fc-hero-search .form-control::placeholder { color: rgba(255,255,255,0.34); }

.fc-hero-search .form-control:focus {
    box-shadow: none;
    border-color: rgba(0,212,170,0.45);
    background: rgba(255,255,255,0.1);
    color: #fff;
    outline: none;
}

.fc-hero-search .btn {
    border-radius: 0 12px 12px 0;
    background: var(--accent);
    color: var(--p1);
    border: none;
    padding: 0.85rem 1.5rem;
    font-weight: 800;
    font-size: 0.9rem;
    transition: var(--transition);
    white-space: nowrap;
}

.fc-hero-search .btn:hover { background: #00EDBB; }

.fc-hero-stats { display: flex; gap: 2.5rem; margin-top: 2.5rem; flex-wrap: wrap; }

.fc-hero-stat { display: flex; flex-direction: column; gap: 0.12rem; }

.fc-hero-stat strong {
    font-size: 1.85rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent);
    letter-spacing: -0.04em;
    line-height: 1;
}

.fc-hero-stat span {
    font-size: 0.73rem;
    color: rgba(255,255,255,0.4);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* Hero Floating Card */
.fc-hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }

.fc-hero-card-float {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 1.6rem;
    backdrop-filter: blur(16px);
    width: 100%;
    max-width: 295px;
    animation: fc-float 5s ease-in-out infinite;
}

.fc-hero-card-float .card-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: rgba(255,255,255,0.38);
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.fc-hero-card-float .card-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.1rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 0.3rem;
}

.fc-hero-card-float .card-sub {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.38);
    margin-bottom: 1.2rem;
}

.fc-hero-card-float .divider {
    height: 1px;
    background: rgba(255,255,255,0.07);
    margin-bottom: 1rem;
}

.fc-hero-card-float .row-item {
    display: flex;
    justify-content: space-between;
    padding: 0.45rem 0;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.fc-hero-card-float .row-item:last-child { border: none; }

.fc-hero-card-float .row-item span:last-child {
    color: rgba(255,255,255,0.85);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
}

/* ---- Sections ---- */
.fc-section { padding: 5rem 0; }
.fc-section-alt { background: var(--bg2); }

.fc-section-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--p3);
    margin-bottom: 0.5rem;
    display: block;
}

.fc-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 0.4rem;
}

.fc-section-title span { color: var(--p3); }

.fc-section-sub { color: var(--text2); font-size: 0.93rem; max-width: 480px; }

.fc-divider {
    width: 36px;
    height: 3px;
    background: linear-gradient(90deg, var(--p3), var(--accent));
    border-radius: 99px;
    margin: 0.7rem 0 1rem;
}

.fc-divider.mx-auto { margin-left: auto; margin-right: auto; }

/* ---- Cards ---- */
.fc-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-slow);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.fc-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--p3), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.fc-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--border2);
}

.fc-card:hover::before { opacity: 1; }

.fc-calc-card { padding: 1.5rem; display: flex; flex-direction: column; height: 100%; }

.fc-calc-card-icon {
    width: 46px; height: 46px;
    background: linear-gradient(135deg, var(--p1), var(--p3));
    color: #fff;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.fc-calc-card-name {
    font-size: 0.93rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.35rem;
    letter-spacing: -0.01em;
}

.fc-calc-card-desc { font-size: 0.81rem; color: var(--text2); flex: 1; line-height: 1.6; }

.fc-calc-card-link {
    display: inline-flex; align-items: center; gap: 0.3rem;
    color: var(--p3);
    font-size: 0.81rem;
    font-weight: 700;
    text-decoration: none;
    margin-top: 1rem;
    transition: var(--transition);
    letter-spacing: -0.01em;
}

.fc-calc-card-link:hover { color: var(--accent); gap: 0.5rem; }

/* ---- Category Cards ---- */
.fc-cat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.8rem 1.2rem;
    text-align: center;
    transition: var(--transition-slow);
    text-decoration: none;
    display: block;
    color: var(--text);
    position: relative;
    overflow: hidden;
}

.fc-cat-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--p3), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.fc-cat-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-5px);
    border-color: rgba(37,99,235,0.2);
    color: var(--text);
}

.fc-cat-card:hover::after { opacity: 1; }

.fc-cat-icon {
    width: 62px; height: 62px;
    background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(0,212,170,0.08));
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.65rem;
    color: var(--p3);
    margin: 0 auto 0.9rem;
    transition: var(--transition-slow);
}

.fc-cat-card:hover .fc-cat-icon {
    background: linear-gradient(135deg, var(--p3), #1D4ED8);
    color: #fff;
    box-shadow: 0 8px 24px rgba(37,99,235,0.3);
}

.fc-cat-name { font-weight: 700; font-size: 0.86rem; letter-spacing: -0.01em; }
.fc-cat-count { font-size: 0.74rem; color: var(--text3); margin-top: 0.2rem; font-weight: 500; }

/* ---- Popular Card ---- */
.fc-popular-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
    display: block;
}

.fc-popular-card:hover {
    border-color: rgba(37,99,235,0.3);
    box-shadow: var(--shadow-sm);
    color: var(--text);
    transform: translateX(3px);
}

.fc-popular-card-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.95rem 1.15rem;
}

.fc-popular-icon {
    width: 38px; height: 38px;
    background: linear-gradient(135deg, var(--p1), var(--p3));
    border-radius: 9px;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.fc-popular-name { font-weight: 700; font-size: 0.86rem; letter-spacing: -0.01em; }
.fc-popular-cat { font-size: 0.74rem; color: var(--text2); margin-top: 0.08rem; }

/* ---- Feature Cards ---- */
.fc-feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: var(--transition-slow);
    height: 100%;
}

.fc-feature-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-3px);
    border-color: var(--border2);
}

.fc-feature-icon {
    width: 50px; height: 50px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.fc-feature-icon.blue   { background: rgba(37,99,235,0.1);  color: var(--p3); }
.fc-feature-icon.green  { background: rgba(0,212,170,0.1);  color: var(--accent); }
.fc-feature-icon.purple { background: rgba(99,102,241,0.1); color: var(--accent3); }
.fc-feature-icon.amber  { background: rgba(245,158,11,0.1); color: var(--accent2); }
.fc-feature-icon.teal   { background: rgba(20,184,166,0.1); color: #14B8A6; }
.fc-feature-icon.rose   { background: rgba(244,63,94,0.1);  color: #F43F5E; }

.fc-feature-title { font-weight: 700; font-size: 0.93rem; margin-bottom: 0.4rem; letter-spacing: -0.01em; }
.fc-feature-desc { font-size: 0.84rem; color: var(--text2); line-height: 1.65; }

/* ---- Tags ---- */
.fc-tag {
    display: inline-flex;
    align-items: center;
    background: rgba(0,212,170,0.1);
    color: var(--accent);
    border-radius: 99px;
    padding: 0.2em 0.7em;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.fc-tag-cat {
    background: rgba(37,99,235,0.08);
    color: var(--p3);
}

/* ---- Calculator UI ---- */
.fc-calc-wrapper {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.fc-input-group { margin-bottom: 1.2rem; }

.fc-input-group label {
    font-weight: 600;
    font-size: 0.84rem;
    margin-bottom: 0.45rem;
    display: block;
    color: var(--text);
    letter-spacing: -0.01em;
}

.fc-input-group .input-group-text {
    background: linear-gradient(135deg, var(--p1), var(--p3));
    border: none;
    color: #fff;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.fc-input-group .form-control,
.fc-input-group .form-select {
    border: 1.5px solid var(--border2);
    border-radius: var(--radius-xs);
    padding: 0.62rem 0.95rem;
    background: var(--surface);
    color: var(--text);
    font-size: 0.9rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: var(--transition);
}

.fc-input-group .form-control:focus,
.fc-input-group .form-select:focus {
    border-color: var(--p3);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
    background: var(--surface);
    color: var(--text);
    outline: none;
}

.fc-input-group .form-range { accent-color: var(--p3); }

.fc-calc-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--p3) 0%, #1D4ED8 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 0.82rem 2rem;
    font-weight: 700;
    font-size: 0.93rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    letter-spacing: -0.01em;
    margin-top: 0.4rem;
}

.fc-calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(37,99,235,0.38);
}

.fc-reset-btn {
    background: var(--bg2);
    color: var(--text2);
    border: 1.5px solid var(--border2);
    border-radius: 10px;
    padding: 0.72rem 1.5rem;
    font-weight: 600;
    font-size: 0.875rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin-top: 0.6rem;
}

.fc-reset-btn:hover { background: var(--border); color: var(--text); }

/* ---- Results ---- */
.fc-result-panel {
    background: linear-gradient(135deg, var(--p1) 0%, var(--p2) 100%);
    border-radius: var(--radius);
    padding: 2rem;
    color: #fff;
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(37,99,235,0.15);
}

.fc-result-panel::before {
    content: '';
    position: absolute;
    top: -50px; right: -50px;
    width: 220px; height: 220px;
    background: radial-gradient(circle, rgba(0,212,170,0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.fc-result-label {
    font-size: 0.72rem;
    color: rgba(255,255,255,0.48);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    font-weight: 700;
}

.fc-result-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: -0.04em;
    color: var(--accent);
    line-height: 1;
}

.fc-result-sub { font-size: 0.8rem; color: rgba(255,255,255,0.45); margin-top: 0.3rem; }

.fc-summary-table { width: 100%; margin-top: 1.2rem; }
.fc-summary-table tr td {
    padding: 0.52rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    font-size: 0.875rem;
    color: rgba(255,255,255,0.65);
}
.fc-summary-table tr:last-child td { border-bottom: none; }
.fc-summary-table td:last-child {
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: #fff;
}

/* ---- Chart ---- */
.fc-chart-wrapper {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
    margin-top: 1.5rem;
}

.fc-chart-title {
    font-weight: 700;
    font-size: 0.92rem;
    margin-bottom: 1rem;
    color: var(--text);
    letter-spacing: -0.01em;
}

/* ---- Amortization Table ---- */
.fc-amort-table { font-size: 0.79rem; }
.fc-amort-table th {
    background: var(--p1);
    color: rgba(255,255,255,0.8);
    font-weight: 600;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.65rem 0.75rem;
}
.fc-amort-table tbody tr:hover { background: rgba(37,99,235,0.04); }
.fc-amort-table td { padding: 0.48rem 0.75rem; }

/* ---- Breadcrumb ---- */
.fc-breadcrumb { padding: 0.75rem 0; }
.fc-breadcrumb .breadcrumb-item a {
    color: var(--p3);
    text-decoration: none;
    font-size: 0.83rem;
    font-weight: 500;
    transition: var(--transition);
}
.fc-breadcrumb .breadcrumb-item a:hover { color: var(--accent); }
.fc-breadcrumb .breadcrumb-item.active { font-size: 0.83rem; color: var(--text2); }
.fc-breadcrumb .breadcrumb-item + .breadcrumb-item::before { color: var(--text3); }

/* ---- Formula Box ---- */
.fc-formula-box {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 1rem 1.3rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--text);
    margin: 1rem 0;
}

/* ---- FAQ ---- */
.fc-faq .accordion-item {
    background: var(--surface);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.fc-faq .accordion-button {
    font-weight: 600;
    font-size: 0.9rem;
    background: var(--surface);
    color: var(--text);
    border-radius: var(--radius-sm) !important;
    letter-spacing: -0.01em;
}

.fc-faq .accordion-button:not(.collapsed) {
    background: linear-gradient(135deg, var(--p1), var(--p2));
    color: #fff;
    box-shadow: none;
}

.fc-faq .accordion-button:not(.collapsed)::after { filter: invert(1); }

.fc-faq .accordion-body {
    font-size: 0.875rem;
    color: var(--text2);
    background: var(--surface);
    line-height: 1.7;
}

/* ---- Share Buttons ---- */
.fc-share-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.44rem 0.95rem;
    border-radius: var(--radius-xs);
    font-size: 0.79rem;
    font-weight: 700;
    border: none;
    color: #fff;
    transition: var(--transition);
    text-decoration: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.fc-share-btn:hover { opacity: 0.88; transform: translateY(-1px); color: #fff; }
.fc-share-wa { background: #25D366; }
.fc-share-fb { background: #1877F2; }
.fc-share-tw { background: #1DA1F2; }
.fc-share-copy { background: var(--text2); }
.fc-share-print { background: var(--p1); }

/* ---- Footer ---- */
.fc-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    margin-top: auto;
    position: relative;
    overflow: hidden;
}

.fc-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(37,99,235,0.5) 30%, rgba(0,212,170,0.5) 70%, transparent 100%);
}

.fc-footer-heading {
    color: rgba(255,255,255,0.9);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.fc-footer-links { margin: 0; padding: 0; list-style: none; }
.fc-footer-links li { margin-bottom: 0.48rem; }
.fc-footer-links a {
    color: var(--footer-text);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}
.fc-footer-links a:hover { color: var(--accent); }

.fc-footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); }
.fc-footer .text-muted { color: var(--footer-text) !important; }

.fc-social-btn {
    width: 34px; height: 34px;
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--footer-text);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem;
    transition: var(--transition);
    text-decoration: none;
}

.fc-social-btn:hover {
    background: var(--accent);
    color: var(--p1);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.fc-badge-pill {
    background: rgba(255,255,255,0.05) !important;
    color: var(--footer-text) !important;
    border: 1px solid rgba(255,255,255,0.08) !important;
    text-decoration: none;
    border-radius: 99px;
    font-size: 0.74rem;
    padding: 0.28em 0.75em;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: -0.01em;
}

.fc-badge-pill:hover {
    background: var(--accent) !important;
    color: var(--p1) !important;
    border-color: var(--accent) !important;
}

/* ---- Admin ---- */
.fc-admin-sidebar {
    background: var(--p1);
    min-height: 100vh;
    width: 250px;
    position: fixed;
    left: 0; top: 0;
    z-index: 1040;
    overflow-y: auto;
    transition: transform 0.3s;
    box-shadow: 4px 0 24px rgba(0,0,0,0.2);
    border-right: 1px solid rgba(255,255,255,0.05);
}

.fc-admin-sidebar .sidebar-brand {
    padding: 1.3rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.07);
    display: flex; align-items: center; gap: 0.5rem;
    letter-spacing: -0.03em;
}

.fc-admin-sidebar .nav-link {
    color: rgba(255,255,255,0.58);
    padding: 0.65rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex; align-items: center; gap: 0.6rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
    letter-spacing: -0.01em;
}

.fc-admin-sidebar .nav-link:hover,
.fc-admin-sidebar .nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.07);
    border-left-color: var(--accent);
}

.fc-admin-sidebar .nav-link i { font-size: 1rem; width: 18px; }

.fc-admin-main { margin-left: 250px; min-height: 100vh; background: var(--bg); transition: margin 0.3s; }

.fc-admin-topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0.85rem 1.75rem;
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 1030;
    box-shadow: var(--shadow-sm);
}

.fc-admin-content { padding: 1.75rem; }

.fc-stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex; align-items: center; gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.fc-stat-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.fc-stat-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem; color: #fff;
    flex-shrink: 0;
}

.fc-stat-icon.bg-primary { background: linear-gradient(135deg, var(--p1), var(--p3)); }
.fc-stat-icon.bg-success { background: linear-gradient(135deg, #065F46, #059669); }
.fc-stat-icon.bg-warning { background: linear-gradient(135deg, #92400E, var(--accent2)); }
.fc-stat-icon.bg-info    { background: linear-gradient(135deg, #0C4A6E, #0EA5E9); }

.fc-stat-val {
    font-size: 1.75rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: -0.04em;
    color: var(--text);
    line-height: 1;
}

.fc-stat-label { font-size: 0.79rem; color: var(--text2); margin-top: 0.2rem; font-weight: 500; }

/* ---- Animations ---- */
@keyframes fc-fadein {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fc-float {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

.fc-fadein { animation: fc-fadein 0.5s cubic-bezier(0.4,0,0.2,1) both; }
.fc-fadein-1 { animation-delay: 0.06s; }
.fc-fadein-2 { animation-delay: 0.13s; }
.fc-fadein-3 { animation-delay: 0.21s; }
.fc-fadein-4 { animation-delay: 0.29s; }

/* ---- Print ---- */
@media print {
    .fc-navbar, .fc-footer, .fc-share-btn, .fc-calc-btn, .fc-reset-btn, .fc-hero { display: none !important; }
    .fc-result-panel { color: #000; background: #f0f4f8; }
    .fc-admin-sidebar, .fc-admin-topbar { display: none !important; }
    .fc-admin-main { margin-left: 0; }
}

/* ---- Responsive ---- */
@media (max-width: 991px) {
    .fc-admin-sidebar { transform: translateX(-100%); }
    .fc-admin-sidebar.show { transform: translateX(0); }
    .fc-admin-main { margin-left: 0; }
    .fc-hero { padding: 3.5rem 0 3rem; }
    .fc-search-input { min-width: 120px; }
    .fc-section { padding: 3.5rem 0; }
}

@media (max-width: 767px) {
    .fc-result-value { font-size: 2rem; }
    .fc-hero h1 { font-size: 2rem; }
    .fc-hero-stats { gap: 1.5rem; }
    .fc-hero-stat strong { font-size: 1.5rem; }
    .fc-section { padding: 3rem 0; }
    .fc-calc-wrapper { padding: 1.25rem; }
}