/* Global Design Tokens */
:root {
    --primary-color: #0088ff;
    --secondary-color: #00154c;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --glass-bg: rgba(15, 23, 42, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --panel-radius: 28px;
    --transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: #000;
    background-image: url('nu.jpeg');
    background-size: cover;
    background-position: center;
    color: white;
    overflow-x: hidden;
}

#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    height: 80px;
    display: flex;
    align-items: center;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 6%;
    width: 100%;
}

.logo img {
    height: 50px;
    width: auto;
}

.project-name {
    color: white;
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 1rem;
    padding-right: 1.5rem;
    border-right: 1px solid var(--glass-border);
}

.back-home {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Dashboard Grid Layout */
main {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 110px 4% 40px;
}

.dashboard-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 25px;
    max-width: 1300px;
    width: 100%;
}

/* Common Panel Styling */
.form-panel,
.predictor-sidebar {
    background: var(--glass-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: var(--panel-radius);
    box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
}

.form-panel {
    padding: 35px 40px;
}

.predictor-sidebar {
    padding: 25px 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 100px;
    height: fit-content;
}

/* Card Header */
.card-logo {
    width: 160px;
    margin-bottom: 15px;
}

h1 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
}

.info-divider {
    width: 40px;
    height: 3px;
    background: var(--primary-color);
    margin: 0 auto 25px;
    border-radius: 2px;
}

/* Switch Style */
.toggle-group {
    margin-bottom: 20px;
    text-align: left;
}

.toggle-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

.switch-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.03);
    padding: 10px 18px;
    border-radius: 14px;
    border: 1px solid var(--glass-border);
}

.switch-label {
    font-size: 0.85rem;
    font-weight: 600;
}

.premium-switch {
    position: relative;
    width: 50px;
    height: 26px;
}

.premium-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 34px;
    border: 1px solid var(--glass-border);
    transition: .4s;
}

.switch-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: .4s;
}

input:checked+.switch-slider {
    background-color: var(--primary-color);
}

input:checked+.switch-slider:before {
    transform: translateX(25px);
}

/* Inputs */
.input-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 15px;
}

.input-group {
    text-align: left;
    margin-bottom: 12px;
}

.input-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.5);
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: white;
    font-size: 0.9rem;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(0, 136, 255, 0.15);
}

/* Validation Feedback */
.input-group input.input-error {
    border-color: var(--danger-color) !important;
    color: var(--danger-color) !important;
    background: rgba(239, 68, 68, 0.08) !important;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.3) !important;
}

/* Results Sidebar Styling */
.calculation-area {
    background: rgba(255, 255, 255, 0.015);
    border-radius: 18px;
    border: 1px dashed var(--glass-border);
    padding: 20px;
    text-align: center;
}

.readout-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.25);
    letter-spacing: 2px;
    margin-bottom: 5px;
}

.score-hero span {
    font-size: 2.8rem;
    font-weight: 800;
    text-shadow: 0 0 15px rgba(0, 136, 255, 0.25);
}

.score-hero small {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.15);
    margin-left: 4px;
}

.premium-progress {
    height: 5px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    margin-top: 12px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #00154c, #0088ff);
    transition: width 0.5s ease;
}

/* Predictor Grid */
.predictor-section {
    text-align: left;
}

.predictor-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.grade-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.grade-card {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--glass-border);
    padding: 10px 5px;
    border-radius: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1px;
    transition: var(--transition);
}

.grade-card:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-2px);
}

.grade-card .label {
    font-size: 0.6rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.35);
    text-transform: uppercase;
}

.grade-card .val {
    font-size: 1.05rem;
    font-weight: 800;
}

/* Grade Coloring */
.target-aplus .val {
    color: #facc15;
}

.target-a .val {
    color: #10b981;
}

.target-bplus .val {
    color: #3b82f6;
}

.target-b .val {
    color: #6366f1;
}

.target-f .val {
    color: #ef4444;
}

.predictor-note {
    font-size: 0.6rem;
    color: rgba(255, 255, 255, 0.15);
    margin-top: 12px;
    font-style: italic;
}

/* Buttons */
.action-buttons {
    margin-top: 25px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.premium-btn {
    padding: 16px;
    border-radius: 14px;
    border: none;
    background: linear-gradient(135deg, #00154c, #0088ff);
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
}

.premium-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(0, 136, 255, 0.3);
}

.clear-btn {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.15);
    color: #ef4444;
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
    font-weight: 600;
}

.clear-btn:hover {
    background: #ef4444;
    color: white;
}

/* Footer - Simple Smooth Transparent Centered */
footer {
    padding: 2rem 0;
    text-align: center;
    background: transparent;
    backdrop-filter: blur(5px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: auto;
}

footer p {
    margin: 0;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.85rem;
    letter-spacing: 1px;
}

/* Responsive */
@media (max-width: 1000px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }

    .predictor-sidebar {
        position: static;
        height: auto;
    }
}

@media (max-width: 600px) {
    .form-panel {
        padding: 30px 20px;
    }

    .input-grid {
        grid-template-columns: 1fr;
    }

    .grade-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    nav {
        padding: 0 4%;
    }

    .project-name {
        display: none;
    }
}