:root {
    /* Academic Clean Professional Palette */
    --bg-base: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --accent-glow: #0284c7;
    --accent-glow-subtle: rgba(2, 132, 199, 0.08);
    --shadow-extrusion: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 0 1px 1px rgba(255, 255, 255, 0.8) inset;
    --shadow-inset: inset 2px 2px 6px rgba(148, 163, 184, 0.3), inset -2px -2px 6px rgba(255, 255, 255, 0.9);
    --color-danger: #be123c;
    --color-success: #15803d;
    --bg-glass: rgba(255, 255, 255, 0.75);
    --border-glass: 1px solid rgba(226, 232, 240, 0.8);
}

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; 
}

body { 
    background-color: var(--bg-base); 
    color: var(--text-primary); 
    min-height: 100vh; 
    padding: 1.5rem; 
    overflow-x: hidden; 
}

.wizard-overlay { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh; 
    background: rgba(241, 245, 249, 0.85); 
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999; 
    display: none; 
    align-items: center; 
    justify-content: center; 
    padding: 1rem; 
}

.wizard-overlay.active { 
    display: flex; 
}

.wizard-card { 
    background: var(--bg-glass); 
    backdrop-filter: blur(20px); 
    -webkit-backdrop-filter: blur(20px); 
    border: var(--border-glass); 
    border-radius: 16px; 
    padding: 2rem; 
    width: 100%; 
    max-width: 500px; 
    box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.1); 
}

.step-indicator { 
    font-size: 0.8rem; 
    font-weight: 600; 
    color: var(--text-secondary); 
    text-transform: uppercase; 
    letter-spacing: 0.08em; 
    margin-bottom: 0.5rem; 
}

.wizard-step { 
    display: none; 
    flex-direction: column; 
    gap: 1.5rem; 
}

.wizard-step.active { 
    display: flex; 
}

.wizard-step h2 { 
    font-size: 1.35rem; 
    font-weight: 700; 
    letter-spacing: -0.01em; 
    color: var(--text-primary);
}

.navigation-bar { 
    display: flex; 
    flex-direction: column; 
    gap: 1rem; 
    align-items: center; 
    background: var(--bg-glass); 
    backdrop-filter: blur(16px); 
    -webkit-backdrop-filter: blur(16px); 
    border: var(--border-glass); 
    padding: 1rem 1.25rem; 
    border-radius: 14px; 
    box-shadow: var(--shadow-extrusion); 
    margin-bottom: 2rem; 
}

.nav-brand { 
    font-weight: 700; 
    font-size: 1.15rem; 
    letter-spacing: -0.02em; 
    color: var(--accent-glow); 
}

.nav-controls { 
    display: flex; 
    gap: 0.5rem; 
    width: 100%; 
}

.nav-tab { 
    flex: 1; 
    background: transparent; 
    border: none; 
    padding: 0.6rem 0.5rem; 
    font-size: 0.85rem; 
    font-weight: 600; 
    color: var(--text-secondary); 
    cursor: pointer; 
    border-radius: 8px; 
    transition: all 0.2s ease; 
    text-align: center; 
}

.nav-tab.active { 
    box-shadow: var(--shadow-inset); 
    color: var(--accent-glow); 
    background: rgba(255, 255, 255, 0.6); 
}

.dashboard-grid { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 1.5rem; 
    align-items: start; 
}

.sidebar-form { 
    display: flex; 
    flex-direction: column; 
    gap: 1.5rem; 
}

.glass-card { 
    background: var(--bg-glass); 
    backdrop-filter: blur(16px); 
    -webkit-backdrop-filter: blur(16px); 
    border: var(--border-glass); 
    border-radius: 14px; 
    padding: 1.5rem; 
    box-shadow: var(--shadow-extrusion); 
}

.element-container h3 { 
    font-size: 1.05rem; 
    font-weight: 700; 
    margin-bottom: 1.25rem; 
    color: var(--text-primary); 
}

.input-group { 
    margin-bottom: 1.25rem; 
    display: flex; 
    flex-direction: column; 
    gap: 0.4rem; 
}

label { 
    font-size: 0.75rem; 
    font-weight: 700; 
    color: var(--text-secondary); 
    text-transform: uppercase; 
    letter-spacing: 0.05em; 
}

input, select { 
    width: 100%; 
    padding: 0.65rem 0.75rem; 
    border: 1px solid rgba(203, 213, 225, 0.8); 
    border-radius: 8px; 
    background: rgba(255, 255, 255, 0.9); 
    color: var(--text-primary); 
    font-weight: 500; 
    font-size: 0.9rem; 
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02); 
    outline: none; 
    appearance: none; 
    -webkit-appearance: none; 
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

select { 
    cursor: pointer; 
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'><path fill='%23475569' d='M0 0l5 5 5-5z'/></svg>"); 
    background-repeat: no-repeat; 
    background-position: right 1rem center; 
    background-size: 10px; 
    padding-right: 2.5rem !important; 
}

input:focus, select:focus { 
    border-color: var(--accent-glow); 
    background: #ffffff; 
    box-shadow: 0 0 0 3px var(--accent-glow-subtle);
}

.form-row-grid { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 1rem; 
}

.btn { 
    width: 100%; 
    padding: 0.75rem; 
    border: 1px solid rgba(203, 213, 225, 0.8); 
    border-radius: 8px; 
    background: linear-gradient(to bottom, #ffffff, #f8fafc); 
    color: var(--accent-glow); 
    font-weight: 600; 
    font-size: 0.9rem; 
    cursor: pointer; 
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05); 
    text-align: center; 
    transition: all 0.15s ease;
}

.btn:hover {
    background: linear-gradient(to bottom, #f8fafc, #f1f5f9);
    border-color: var(--accent-glow);
}

.btn:active { 
    box-shadow: var(--shadow-inset); 
    transform: scale(0.99); 
}

.line-btn { 
    box-shadow: none; 
    border: 1px solid rgba(203, 213, 225, 0.8); 
    background: transparent; 
    color: var(--text-secondary); 
}

.button-row { 
    display: grid; 
    grid-template-columns: 90px 1fr; 
    gap: 1rem; 
}

.matrix-display-area { 
    display: flex; 
    flex-direction: column; 
    gap: 1.5rem; 
}

.cards-layout-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
    gap: 1.5rem; 
}

.semester-card { 
    display: flex; 
    flex-direction: column; 
    gap: 1rem; 
}

.semester-card.past { 
    border-left: 4px solid var(--color-success); 
}

.semester-card.future { 
    opacity: 0.75; 
    border: 1px dashed rgba(148, 163, 184, 0.6); 
    box-shadow: none; 
}

.card-header-row { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

.card-header-row h4 { 
    font-size: 1.05rem; 
    font-weight: 700; 
    color: var(--text-primary);
}

.mode-toggle-label { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.4rem; 
    font-size: 0.7rem; 
    font-weight: 600;
    cursor: pointer; 
    background: rgba(226, 232, 240, 0.6); 
    padding: 0.2rem 0.5rem; 
    border-radius: 12px; 
    user-select: none; 
    color: var(--text-secondary);
}

table { 
    width: 100%; 
    border-collapse: collapse; 
}

th, td { 
    padding: 0.55rem 0.25rem; 
    text-align: left; 
    font-size: 0.85rem; 
    border-bottom: 1px solid rgba(226, 232, 240, 0.6); 
}

th { 
    color: var(--text-secondary); 
    font-weight: 700; 
    text-transform: uppercase; 
    font-size: 0.7rem; 
    letter-spacing: 0.03em;
}

.action-cell { 
    text-align: right; 
}

.row-del-btn { 
    background: none; 
    border: none; 
    color: var(--color-danger); 
    font-weight: bold; 
    cursor: pointer; 
    font-size: 0.9rem; 
    padding: 0.25rem; 
}

.credit-pill-badge { 
    display: inline-block; 
    padding: 0.15rem 0.45rem; 
    border-radius: 6px; 
    background: rgba(226, 232, 240, 0.6); 
    font-weight: 600; 
    font-size: 0.75rem; 
    color: var(--text-secondary); 
}

.status-banner { 
    padding: 1rem 1.25rem; 
    border-radius: 10px; 
    font-weight: 600; 
    font-size: 0.9rem; 
    line-height: 1.4; 
    box-shadow: var(--shadow-inset); 
    margin-bottom: 1.5rem; 
    border: 1px solid transparent;
}

.status-banner.success { 
    color: var(--color-success); 
    background: rgba(21, 128, 61, 0.06); 
    border-color: rgba(21, 128, 61, 0.15);
}

.status-banner.danger { 
    color: var(--color-danger); 
    background: rgba(190, 18, 60, 0.06); 
    border-color: rgba(190, 18, 60, 0.15);
}

.detailed-report h3 { 
    font-size: 1.1rem; 
    font-weight: 700; 
    margin-bottom: 1rem; 
}

.metric-pill { 
    display: inline-block; 
    padding: 0.4rem 0.85rem; 
    background: rgba(255, 255, 255, 0.8); 
    box-shadow: var(--shadow-inset); 
    border-radius: 8px; 
    font-weight: 700; 
    font-size: 1rem; 
    margin-bottom: 1rem; 
    border: 1px solid rgba(226, 232, 240, 0.8);
}

.metric-pill span { 
    color: var(--accent-glow); 
}

.advice-block { 
    padding: 1rem; 
    border-radius: 8px; 
    font-weight: 500; 
    font-size: 0.85rem; 
    background: rgba(241, 245, 249, 0.8); 
    border: 1px solid rgba(226, 232, 240, 0.8);
    color: var(--text-secondary);
}

.hidden { 
    display: none !important; 
}

.danger-text { 
    color: var(--color-danger) !important; 
}

@media (min-width: 650px) { 
    .navigation-bar { 
        flex-direction: row; 
        justify-content: space-between; 
    } 
    .nav-controls { 
        width: auto; 
        min-width: 400px; 
    } 
}

@media (min-width: 1024px) { 
    .dashboard-grid { 
        grid-template-columns: 340px 1fr; 
        gap: 2rem; 
    } 
}

/*
/* Dark Mode Academic Palette Overrides 
[data-theme="dark"] {
    --bg-base: #0f172a;                  /* Deep slate background /
    --text-primary: #f8fafc;             /* Crisp bright text *
    --text-secondary: #94a3b8;           /* Muted slate text *
    --accent-glow: #38bdf8;              Brighter sky blue for contrast *
    --accent-glow-subtle: rgba(56, 189, 248, 0.15);
    
    /* Adjusted shadows for dark surfaces 
    --shadow-extrusion: 0 10px 30px -5px rgba(0, 0, 0, 0.3), 0 0 1px 1px rgba(255, 255, 255, 0.05) inset;
    --shadow-inset: inset 2px 2px 6px rgba(2, 6, 23, 0.6), inset -2px -2px 6px rgba(51, 65, 85, 0.4);
    
    --color-danger: #fb7185;
    --color-success: #4ade80;
    
    /* Dark frosted glass 
    --bg-glass: rgba(30, 41, 59, 0.75);
    --border-glass: 1px solid rgba(51, 65, 85, 0.8);
}

/* Specific component tweaks for dark theme readability 
[data-theme="dark"] input, 
[data-theme="dark"] select {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(51, 65, 85, 0.8);
    color: var(--text-primary);
}


[data-theme="dark"] .btn {
    background: linear-gradient(to bottom, #1e293b, #0f172a);
    border-color: rgba(51, 65, 85, 0.8);
    color: var(--text-primary);
}

[data-theme="dark"] .btn:hover {
    background: linear-gradient(to bottom, #334155, #1e293b);
}
*/