/* =====================================================
   Notes Print Cost Calculator - Modern UI v2.0
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap');

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --success: #10b981;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --danger: #ef4444;
    --danger-dark: #dc2626;

    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-page: #f1f5f9;

    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 10px 40px -15px rgba(0,0,0,0.1);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-page);
    background-image:
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.08) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    padding-bottom: 60px;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: 'Plus Jakarta Sans', sans-serif; letter-spacing: -0.01em; }

/* ==================== TOP HEADER ==================== */
.top-header {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #2563eb 100%);
    color: #fff;
    padding: 20px 32px;
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
    position: relative;
    overflow: hidden;
}

.top-header::before {
    content: '';
    position: absolute;
    top: -50%; right: -5%;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    pointer-events: none;
}

.top-header h1 {
    font-size: 22px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1;
    position: relative;
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    z-index: 1;
    position: relative;
}

.top-header .tag {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
    border: 1px solid rgba(255,255,255,0.2);
}

.top-header a {
    color: #fff !important;
    text-decoration: none !important;
    background: rgba(255,255,255,0.15) !important;
    backdrop-filter: blur(12px);
    padding: 10px 18px !important;
    border-radius: 100px !important;
    font-size: 13px !important;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.25);
    transition: var(--transition);
}

.top-header a:hover { background: rgba(255,255,255,0.25) !important; transform: translateY(-1px); }

/* ==================== STICKY TOTALIZER (stat cards) ==================== */
.sticky-totalizer {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 251, 235, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 16px 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 12px;
    border-bottom: 1px solid rgba(251, 191, 36, 0.3);
    box-shadow: 0 4px 16px rgba(0,0,0,0.04);
}

.sticky-totalizer .stat {
    background: #ffffff;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    text-align: left;
    border: 1px solid rgba(251, 191, 36, 0.25);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-height: 62px;
}

.sticky-totalizer .stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.sticky-totalizer .stat small {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.sticky-totalizer .stat span {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.2;
}

/* Highlight last stat (final price) */
.sticky-totalizer .stat:last-child {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-color: transparent;
}
.sticky-totalizer .stat:last-child small { color: rgba(255,255,255,0.8); }
.sticky-totalizer .stat:last-child span { color: #fff; }

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1320px;
    margin: 28px auto;
    padding: 0 24px;
}

/* ==================== CARD ==================== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 26px 28px;
    margin-bottom: 24px;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--card-border);
    transition: var(--transition);
}

.card:hover { box-shadow: 0 4px 6px rgba(0,0,0,0.04), 0 20px 50px -20px rgba(0,0,0,0.15); }

.card h2 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.card h2 .icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
}

/* ==================== FORM ==================== */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-group { display: flex; flex-direction: column; }

.form-group label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 7px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.form-group input, .form-group select {
    padding: 11px 14px;
    border: 1.5px solid var(--card-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
    background: #f8fafc;
    color: var(--text-primary);
}

.form-group input:hover { border-color: #cbd5e1; }

.form-group input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
}

.form-group input[readonly] {
    background: #f1f5f9;
    color: var(--text-muted);
    cursor: not-allowed;
}

/* ==================== SUBJECT TABLE ==================== */
.subject-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 16px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 0 0 1px var(--card-border);
}

.subject-table thead th {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: #e2e8f0;
    text-align: left;
    padding: 14px 14px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.subject-table tbody tr {
    background: #fff;
    transition: var(--transition);
}

.subject-table tbody tr:nth-child(even) { background: #fafbff; }
.subject-table tbody tr:hover { background: #eef2ff; }

.subject-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 14px;
    font-weight: 500;
    vertical-align: middle;
}

.subject-table tbody tr:last-child td { border-bottom: none; }

.subject-table td input[type="text"],
.subject-table td input[type="number"] {
    width: 100%;
    padding: 9px 11px;
    border: 1.5px solid var(--card-border);
    border-radius: 7px;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    background: #fff;
    transition: var(--transition);
}

.subject-table td input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.subject-table td.calc-cell {
    font-weight: 700;
    color: var(--success-dark);
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

/* Profit ₹ column - amber highlight */
.subject-table td.sub-profit-amt {
    color: #b45309;
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

/* Selling ₹ column - emerald bold */
.subject-table td.sub-sell {
    color: #065f46;
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    font-size: 15px;
}

.btn-delete {
    background: #fee2e2;
    color: var(--danger-dark);
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 700;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn-delete:hover { background: var(--danger); color: #fff; transform: scale(1.08); }

/* ==================== BUTTONS ==================== */
.btn {
    padding: 11px 22px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.2px;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45); }

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}
.btn-success:hover { box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45); }

.btn-warning {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}
.btn-warning:hover { box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45); }

.btn-group { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }

/* ==================== TOGGLE SWITCH ==================== */
.switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 26px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider-ui {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: #cbd5e1;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 26px;
}
.slider-ui:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}
.switch input:checked + .slider-ui {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.35);
}
.switch input:checked + .slider-ui:before { transform: translateX(20px); }

/* ==================== FINAL SUMMARY ==================== */
.final-summary {
    background: linear-gradient(135deg, #065f46 0%, #047857 50%, #059669 100%);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 24px;
    box-shadow: 0 10px 40px rgba(5, 150, 105, 0.3);
    position: relative;
    overflow: hidden;
}

.final-summary::before {
    content: '';
    position: absolute;
    top: -80px; right: -80px;
    width: 260px; height: 260px;
    background: radial-gradient(circle, rgba(255,255,255,0.18) 0%, transparent 70%);
    pointer-events: none;
}

.final-summary h2 {
    color: #d1fae5;
    border-bottom: 1px solid rgba(255,255,255,0.25);
    position: relative;
}

.final-summary h2 .icon {
    background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
    margin-top: 10px;
    position: relative;
}

.summary-item {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    padding: 18px 18px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.15);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-item:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }

.summary-item .label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.7px;
    opacity: 0.85;
    line-height: 1.2;
}

.summary-item .value {
    font-size: 22px;
    font-weight: 800;
    font-family: 'Plus Jakarta Sans', sans-serif;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}

.summary-item.highlight {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #422006;
    border-color: transparent;
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.4);
}

.summary-item.highlight .label { opacity: 1; color: #78350f; }
.summary-item.highlight .value { font-size: 26px; }

/* ==================== TOAST ==================== */
#toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #1e293b;
    color: #fff;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    display: none;
    z-index: 999;
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
    font-weight: 600;
    font-size: 14px;
    animation: slideUp 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 400px;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

#toast.success { background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%); }
#toast.error { background: linear-gradient(135deg, var(--danger) 0%, var(--danger-dark) 100%); }

/* ==================== SCROLLBAR ==================== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 900px) {
    .top-header h1 { font-size: 18px; }
    .card { padding: 20px 18px; }
    .container { padding: 0 14px; }
}

@media (max-width: 700px) {
    .sticky-totalizer { grid-template-columns: repeat(2, 1fr); padding: 12px 14px; }
    .sticky-totalizer .stat span { font-size: 17px; }

    .subject-table thead { display: none; }
    .subject-table tbody tr {
        display: block;
        margin-bottom: 14px;
        border: 1px solid var(--card-border);
        border-radius: var(--radius-md);
        padding: 12px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .subject-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border: none;
        padding: 8px 0;
    }
    .subject-table td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-secondary);
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .subject-table td.calc-cell { justify-content: flex-end; }
    .subject-table td input { max-width: 60%; }

    .summary-grid { grid-template-columns: 1fr 1fr; }
    .summary-item .value { font-size: 18px; }
    .summary-item.highlight .value { font-size: 22px; }
}

/* ==================== PRINT STYLES ==================== */
@media print {
    .top-header, .sticky-totalizer, .btn, .btn-group, .btn-delete { display: none !important; }
    body { background: #fff; }
    .card { box-shadow: none; border: 1px solid #ccc; }
    .final-summary { background: #fff !important; color: #000 !important; }
    .final-summary .summary-item { background: #f1f5f9 !important; color: #000 !important; }
    .final-summary h2 { color: #000 !important; }
}