:root {
    --bg-color: #18256b;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --accent-solid: #6366f1;
    --danger: #ef4444;
    --success: #10b981;
    --radius-lg: 20px;
    --radius-md: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

/* Background Blobs for Visual depth */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    filter: blur(80px);
    opacity: 0.4;
}

.blob {
    position: absolute;
    width: 40vw;
    height: 40vw;
    border-radius: 50%;
}

.blob-1 {
    background: #4f46e5;
    top: -10%;
    left: -10%;
    animation: move 20s infinite alternate;
}

.blob-2 {
    background: #7c3aed;
    bottom: -10%;
    right: -10%;
    animation: move 25s infinite alternate-reverse;
}

.blob-3 {
    background: #2563eb;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30vw;
}

@keyframes move {
    from { transform: translate(0, 0) rotate(0deg); }
    to { transform: translate(100px, 50px) rotate(30deg); }
}

.app-container {
    width: 100%;
    max-width: 1100px;
    z-index: 10;
}

.app-header {
    text-align: center;
    margin-bottom: 50px;
}

.app-header h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 10px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 30px;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    border-radius: var(--radius-lg);
    padding: 30px;
    position: relative;
    overflow: hidden;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Semesters Styles */
#semesters-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.semester-wrapper {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
}

.semester-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.subjects-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
}

.subject-row {
    display: grid;
    grid-template-columns: 1fr 80px 100px 32px;
    gap: 10px;
    align-items: center;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

input, select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 12px;
    color: white;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s;
}

input:focus, select:focus {
    border-color: var(--accent-solid);
    background: rgba(255, 255, 255, 0.1);
}

.input-grade option {
    background: #1e293b;
}

/* Buttons */
button {
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-add-subject {
    background: transparent;
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    width: 100%;
    padding: 8px;
    border-radius: 8px;
    gap: 8px;
}

.btn-add-subject:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
    border-color: var(--accent-solid);
}

.btn-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.btn-icon:hover {
    background: var(--danger);
    color: white;
}

.btn-icon-sm {
    background: transparent;
    color: var(--text-secondary);
}

.btn-icon-sm:hover {
    color: var(--danger);
}

/* Results section */
.overall-stats {
    margin-top: 30px;
    text-align: center;
}

.stat-item {
    margin-bottom: 20px;
}

.stat-label {
    display: block;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: 30px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.mini-stat {
    background: rgba(255, 255, 255, 0.02);
    padding: 15px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.mini-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.mini-value {
    font-size: 1.25rem;
    font-weight: 600;
}

.status-pass { color: var(--success); }
.status-fail { color: var(--danger); }

.actions {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    padding: 12px;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.btn-ghost:hover {
    color: var(--danger);
}

/* Animations */
.animate-in {
    animation: fadeInScale 0.4s ease-out forwards;
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}