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

:root {
    --bg: #0d1117;
    --surface: #161b22;
    --border: #21262d;
    --border2: #30363d;
    --text: #e6edf3;
    --muted: #8b949e;
    --dim: #484f58;
    --green: #00ff88;
    --cyan: #00eeff;
    --yellow: #ffdd00;
    --orange: #ff8800;
    --red: #ff4444;
    --pink: #ff88aa;
    --purple: #bb88ff;
    --font-display: 'Syne', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-body: 'Segoe UI', system-ui, sans-serif;
    --radius: 10px;
    --radius-lg: 14px;
}

html,
body {
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar {
    width: 5px;
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ── Typography ────────────────────────────────── */
.logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(22px, 5vw, 32px);
    background: linear-gradient(90deg, var(--green), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ── Colors ────────────────────────────────────── */
.green {
    color: var(--green) !important;
}

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

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

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

/* ── Form Elements ─────────────────────────────── */
.lbl {
    display: block;
    font-size: 11px;
    color: var(--muted);
    margin-bottom: 5px;
    letter-spacing: 0.05em;
}

.lbl-sub {
    color: var(--dim);
    font-weight: 400;
}

.inp {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 9px 12px;
    color: var(--text);
    font-size: 13px;
    outline: none;
    margin-bottom: 13px;
    display: block;
    font-family: var(--font-body);
    transition: border-color 0.2s;
}

.inp:focus {
    border-color: var(--green);
}

.inp::placeholder {
    color: var(--dim);
}

select.inp {
    cursor: pointer;
}

select.inp option {
    background: var(--surface);
}

textarea.inp {
    resize: vertical;
}

input[type="date"].inp {
    color-scheme: dark;
}

/* ── Buttons ───────────────────────────────────── */
button {
    font-family: var(--font-body);
    cursor: pointer;
}

button:active {
    transform: scale(0.97);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, var(--green), #00cc6a);
    border: none;
    border-radius: 10px;
    color: var(--bg);
    font-size: 15px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: opacity 0.2s;
}

.btn-primary:disabled {
    background: var(--border);
    color: var(--dim);
    cursor: not-allowed;
}

.btn-cancel {
    flex: 1;
    padding: 9px;
    background: var(--border);
    border: 1px solid var(--border2);
    border-radius: 8px;
    color: var(--muted);
}

.btn-save {
    flex: 2;
    padding: 9px;
    background: linear-gradient(135deg, var(--green), #00cc6a);
    border: none;
    border-radius: 8px;
    color: var(--bg);
    font-size: 14px;
    font-weight: 700;
}

/* ── Toast ─────────────────────────────────────── */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: 10px;
    padding: 12px 20px;
    font-size: 14px;
    max-width: 300px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    animation: slideIn 0.3s ease;
    color: var(--text);
}

.toast.success {
    background: #002a16;
    border-color: var(--green);
    color: var(--green);
}

.toast.error {
    background: #2a0a0a;
    border-color: var(--red);
    color: var(--red);
}

.toast.hidden {
    display: none;
}

/* ── Overlay & Modal ───────────────────────────── */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.82);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: overlayIn 0.2s ease;
    padding: 16px;
}

.overlay.hidden {
    display: none;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--radius-lg);
    padding: 22px;
    width: min(480px, 100%);
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeUp 0.2s ease;
}

.modal-wide {
    width: min(540px, 100%);
}

.modal-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 17px;
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

/* ── Spinner ───────────────────────────────────── */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--dim);
    border-top-color: var(--muted);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

/* ── Error box ─────────────────────────────────── */
.error-box {
    background: #2a0a0a;
    border: 1px solid rgba(255, 68, 68, 0.4);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--red);
    font-size: 13px;
    margin-bottom: 14px;
}

.error-box.hidden {
    display: none;
}

/* ── Confetti ──────────────────────────────────── */
.confetti-piece {
    position: fixed;
    top: -10px;
    border-radius: 2px;
    z-index: 9998;
    animation: confettiFall 2s ease-in forwards;
    pointer-events: none;
}

/* ── Two column ────────────────────────────────── */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

/* ── Section header ────────────────────────────── */
.section-hdr {
    font-size: 11px;
    color: var(--dim);
    letter-spacing: 0.1em;
    font-weight: 600;
    margin: 12px 0 6px;
}

/* ── Animations ────────────────────────────────── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

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

@keyframes overlayIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes glow {

    0%,
    100% {
        text-shadow: 0 0 10px #00ff8888
    }

    50% {
        text-shadow: 0 0 20px #00ff88, 0 0 40px #00ff8844
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: 0.4
    }
}

@keyframes studyPulse {

    0%,
    100% {
        box-shadow: 0 0 20px #00eeff44
    }

    50% {
        box-shadow: 0 0 50px #00eeff88
    }
}

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

    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}