* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #070b1f;
    --bg-card: rgba(255, 255, 255, 0.11);
    --bg-card-strong: rgba(255, 255, 255, 0.18);
    --text-main: #ffffff;
    --text-soft: #cbd5e1;
    --blue: #38bdf8;
    --purple: #a855f7;
    --green: #22c55e;
    --yellow: #eab308;
    --red: #ef4444;
    --border: rgba(255, 255, 255, 0.18);
}

body {
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text-main);
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.28), transparent 35%),
        radial-gradient(circle at bottom right, rgba(168, 85, 247, 0.32), transparent 35%),
        linear-gradient(135deg, #070b1f, #111827, #172554);
    overflow-x: hidden;
}

.background-symbols span {
    position: fixed;
    font-size: 38px;
    opacity: 0.14;
    animation: floatSymbols 8s infinite ease-in-out;
    z-index: 0;
}

.background-symbols span:nth-child(1) {
    top: 12%;
    left: 8%;
}

.background-symbols span:nth-child(2) {
    top: 22%;
    right: 10%;
    animation-delay: 1s;
}

.background-symbols span:nth-child(3) {
    bottom: 18%;
    left: 12%;
    animation-delay: 2s;
}

.background-symbols span:nth-child(4) {
    bottom: 14%;
    right: 14%;
    animation-delay: 3s;
}

.background-symbols span:nth-child(5) {
    top: 52%;
    left: 4%;
    animation-delay: 4s;
}

.background-symbols span:nth-child(6) {
    top: 62%;
    right: 5%;
    animation-delay: 5s;
}

.app {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 36px 20px;
    position: relative;
    z-index: 1;
}

.hero {
    text-align: center;
    margin-bottom: 34px;
    animation: fadeUp 0.8s ease;
}

.hero-badge {
    display: inline-block;
    margin-bottom: 16px;
    padding: 9px 18px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.16);
    border: 1px solid rgba(56, 189, 248, 0.4);
    color: #e0f2fe;
    font-weight: bold;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 4.8rem);
    line-height: 1;
    margin-bottom: 18px;
    background: linear-gradient(135deg, #ffffff, #7dd3fc, #c084fc);
    -webkit-background-clip: text;
    color: transparent;
}

.hero p {
    max-width: 760px;
    margin: 0 auto;
    color: var(--text-soft);
    font-size: 1.05rem;
    line-height: 1.7;
}

.dashboard {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 22px;
    margin-bottom: 22px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 26px;
    padding: 26px;
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
    animation: fadeUp 0.8s ease;
}

.card-header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 22px;
}

.card-header h2 {
    font-size: 1.45rem;
    margin-top: 8px;
}

.card-header p {
    color: var(--text-soft);
    font-size: 0.95rem;
    line-height: 1.5;
    max-width: 260px;
    text-align: right;
}

.card-icon {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: var(--bg-card-strong);
    font-size: 1.5rem;
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.08);
}

form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    color: #e2e8f0;
    font-weight: bold;
    font-size: 0.94rem;
}

.input-group input {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.18);
    outline: none;
    border-radius: 16px;
    padding: 14px 15px;
    background: rgba(15, 23, 42, 0.72);
    color: #ffffff;
    font-size: 1rem;
    transition: 0.25s ease;
}

.input-group input::placeholder {
    color: #94a3b8;
}

.input-group input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.14);
    transform: translateY(-2px);
}

.input-group input.grade-good {
    border-color: var(--green);
}

.input-group input.grade-warning {
    border-color: var(--yellow);
}

.input-group input.grade-danger {
    border-color: var(--red);
}

.grades-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.btn {
    border: none;
    border-radius: 16px;
    padding: 14px 18px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    color: white;
    transition: 0.25s ease;
}

.btn-primary {
    flex: 1;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn:hover {
    transform: translateY(-3px);
    filter: brightness(1.1);
}

.result-panel {
    text-align: center;
    padding: 24px;
    border-radius: 22px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.14);
    margin-bottom: 22px;
    transition: 0.3s ease;
}

.result-emoji {
    font-size: 3.4rem;
    margin-bottom: 8px;
    animation: pulse 2.3s infinite ease-in-out;
}

.result-panel h3 {
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.result-panel p {
    color: var(--text-soft);
    line-height: 1.5;
}

.progress-area {
    margin-bottom: 22px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    color: var(--text-soft);
}

.progress-info strong {
    color: #ffffff;
    font-size: 1.4rem;
}

.progress-bar {
    width: 100%;
    height: 16px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.14);
}

.progress-fill {
    width: 0%;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--red), var(--yellow), var(--green));
    transition: width 0.7s ease;
}

.progress-percent {
    display: block;
    text-align: right;
    margin-top: 8px;
    color: var(--text-soft);
    font-size: 0.9rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.stat-box {
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.1);
    text-align: center;
}

.stat-box span {
    display: block;
    color: var(--text-soft);
    font-size: 0.84rem;
    margin-bottom: 8px;
}

.stat-box strong {
    font-size: 1rem;
    word-break: break-word;
}

.subjects-card {
    min-height: 240px;
}

.empty-state {
    text-align: center;
    padding: 34px 20px;
    color: var(--text-soft);
}

.empty-state span {
    font-size: 3rem;
    display: block;
    margin-bottom: 12px;
}

.empty-state h3 {
    color: #ffffff;
    margin-bottom: 8px;
}

.subjects-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.subject-card {
    padding: 18px;
    border-radius: 20px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.14);
    animation: popIn 0.35s ease;
    position: relative;
    overflow: hidden;
}

.subject-card::before {
    content: "";
    position: absolute;
    inset: 0;
    width: 5px;
}

.subject-card.approved::before {
    background: var(--green);
}

.subject-card.recovery::before {
    background: var(--yellow);
}

.subject-card.failed::before {
    background: var(--red);
}

.subject-top {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 16px;
}

.subject-top h3 {
    font-size: 1.1rem;
}

.subject-top button {
    background: rgba(239, 68, 68, 0.16);
    border: 1px solid rgba(239, 68, 68, 0.35);
    color: #fecaca;
    border-radius: 10px;
    padding: 7px 10px;
    cursor: pointer;
    transition: 0.2s ease;
}

.subject-top button:hover {
    background: rgba(239, 68, 68, 0.28);
}

.grades-line {
    color: var(--text-soft);
    font-size: 0.92rem;
    line-height: 1.6;
    margin-bottom: 14px;
}

.subject-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
}

.average-pill {
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    font-weight: bold;
}

.status-pill {
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.86rem;
    font-weight: bold;
}

.status-pill.approved {
    background: rgba(34, 197, 94, 0.18);
    color: #bbf7d0;
}

.status-pill.recovery {
    background: rgba(234, 179, 8, 0.18);
    color: #fef08a;
}

.status-pill.failed {
    background: rgba(239, 68, 68, 0.18);
    color: #fecaca;
}

.toast {
    position: fixed;
    right: 22px;
    bottom: 22px;
    background: rgba(15, 23, 42, 0.95);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.16);
    padding: 14px 18px;
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    transform: translateY(120px);
    opacity: 0;
    transition: 0.3s ease;
    z-index: 10;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.confetti {
    position: fixed;
    top: -20px;
    width: 10px;
    height: 16px;
    border-radius: 4px;
    animation: confettiFall 2.4s linear forwards;
    z-index: 20;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes popIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.12);
    }
}

@keyframes floatSymbols {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }

    50% {
        transform: translateY(-22px) rotate(8deg);
    }
}

@keyframes confettiFall {
    from {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }

    to {
        transform: translateY(110vh) rotate(420deg);
        opacity: 0;
    }
}

@media (max-width: 980px) {
    .dashboard {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 700px) {
    .app {
        padding: 24px 14px;
    }

    .card {
        padding: 20px;
        border-radius: 22px;
    }

    .card-header {
        flex-direction: column;
    }

    .card-header p {
        text-align: left;
    }

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

    .actions {
        flex-direction: column;
    }

    .subjects-list {
        grid-template-columns: 1fr;
    }

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