/* ==========================================================================
   Invoice Generator — Premit AI Ltd.
   Clean, modern form UI
   ========================================================================== */

:root {
    --primary: #6c5ce7;
    --primary-light: #a29bfe;
    --primary-bg: #f8f7ff;
    --text: #1a1a2e;
    --text-muted: #636e72;
    --border: #dfe6e9;
    --bg: #f5f6fa;
    --white: #ffffff;
    --danger: #e17055;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 4px;
}

header .company {
    font-size: 16px;
    color: var(--text-muted);
    font-weight: 500;
}

/* Sections */
.form-section {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border);
}

.form-section h2 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-bg);
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-grid.three-col {
    grid-template-columns: 1fr 1fr 1fr;
}

.form-grid.four-col {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.form-grid.five-col {
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
}

select {
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    background: var(--white);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

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

.form-group label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

input[type="text"],
input[type="date"],
input[type="number"],
textarea {
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--white);
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

textarea {
    resize: vertical;
}

/* Line Items Table */
.line-items {
    width: 100%;
    border-collapse: collapse;
}

.line-items thead th {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    padding: 8px 10px;
    text-align: left;
    border-bottom: 2px solid var(--border);
}

.col-desc { width: 40%; }
.col-qty { width: 18%; }
.col-rate { width: 18%; }
.col-amount { width: 18%; text-align: right; }
.col-action { width: 6%; }

.line-items tbody td {
    padding: 6px 4px;
    vertical-align: middle;
}

.line-items tbody input {
    width: 100%;
}

.amount-cell {
    text-align: right;
    font-weight: 600;
    color: var(--text);
    padding-right: 10px !important;
    font-size: 14px;
}

.line-items tfoot td {
    padding: 12px 10px;
    border-top: 2px solid var(--primary);
}

.total-label {
    text-align: right;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 13px;
    color: var(--text-muted);
}

.total-amount {
    text-align: right;
    font-weight: 800;
    font-size: 20px;
    color: var(--primary);
    padding-right: 10px !important;
}

/* Buttons */
.btn-remove {
    background: none;
    border: 1.5px solid var(--border);
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.btn-remove:hover {
    border-color: var(--danger);
    color: var(--danger);
    background: #ffeaa7;
}

.btn-add {
    margin-top: 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border: 1.5px dashed var(--primary-light);
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
}

.btn-add:hover {
    background: var(--primary);
    color: var(--white);
    border-style: solid;
}

/* Generate Button */
.form-actions {
    margin-top: 24px;
    text-align: center;
}

.btn-generate {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 16px 48px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 14px rgba(108, 92, 231, 0.3);
}

.btn-generate:hover {
    background: #5a4bd1;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.4);
}

.btn-generate:active {
    transform: translateY(0);
}

.btn-generate span {
    margin-right: 8px;
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 20px 16px;
    }

    .form-grid,
    .form-grid.three-col {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 28px;
    }
}