/* =========================
   Professional Executive Dark Theme
   ========================= */

:root {
    --bg: #0b1220;
    --bg-alt: #111827;
    --surface: #0f172a;
    --surface-2: #1e293b;
    --surface-3: #243244;
    --border: #334155;
    --text: #e5e7eb;
    --text-soft: #94a3b8;
    --heading: #f8fafc;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-soft: rgba(59, 130, 246, 0.18);
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --radius: 12px;
}

body.dark-mode {
    margin: 0;
    padding: 0;
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.10), transparent 28%),
        radial-gradient(circle at top right, rgba(14, 165, 233, 0.08), transparent 24%),
        linear-gradient(180deg, #09111f 0%, #0b1220 100%);
    color: var(--text);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    box-sizing: border-box;
    min-height: 100vh;
}

*, *:before, *:after {
    box-sizing: inherit;
}

/* Header / Footer */
header,
footer {
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.96), rgba(17, 24, 39, 0.96));
    border-bottom: 1px solid rgba(51, 65, 85, 0.55);
    padding: 16px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
}

footer {
    border-top: 1px solid rgba(51, 65, 85, 0.55);
    border-bottom: none;
    margin-top: 40px;
}

header h1 {
    margin: 0;
    color: #dbeafe;
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 0.4px;
}

.header-right nav {
    display: flex;
    align-items: center;
    gap: 18px;
}

.header-right nav a {
    color: var(--text-soft);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease, transform 0.2s ease;
}

.header-right nav a:hover {
    color: var(--heading);
    transform: translateY(-1px);
}

footer p {
    margin: 0;
    color: var(--text-soft);
    font-size: 0.95rem;
}

main {
    padding: 30px 28px 40px;
}

/* Headings */
h2, h3, h4 {
    color: var(--heading);
    margin-top: 0;
}

/* Tabs */
.tabs {
    margin-bottom: 22px;
}

.tab-button {
    padding: 10px 16px;
    margin-right: 8px;
    cursor: pointer;
    background: linear-gradient(180deg, #1e293b, #172033);
    color: var(--text);
    border: 1px solid var(--border);
    outline: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.tab-button:hover {
    background: linear-gradient(180deg, #243244, #1c2740);
    border-color: #475569;
}

.tab-button.active {
    background: linear-gradient(180deg, var(--accent), var(--accent-hover));
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.28);
}

.tab-content {
    display: none;
}

/* Form Containers */
.form-container {
    background: linear-gradient(180deg, rgba(17, 24, 39, 0.96), rgba(15, 23, 42, 0.96));
    border: 1px solid rgba(51, 65, 85, 0.7);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 18px;
    box-shadow: var(--shadow);
    max-width: 640px;
    margin-left: 0;
    margin-right: 0;
}

.form-container h4 {
    margin-top: 0;
    margin-bottom: 14px;
    color: var(--heading);
}

.form-container label {
    display: block;
    margin: 10px 0 6px;
    color: var(--text-soft);
    font-weight: 600;
}

.form-container input,
.form-container select,
.form-container textarea,
.login-container form input,
.date-form input,
.modal-content input,
.modal-content select {
    width: 100%;
    padding: 11px 12px;
    margin-bottom: 12px;
    background: rgba(15, 23, 42, 0.92);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.form-container input:focus,
.form-container select:focus,
.form-container textarea:focus,
.login-container form input:focus,
.date-form input:focus,
.modal-content input:focus,
.modal-content select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
    background: rgba(15, 23, 42, 1);
}

/* Buttons */
.form-container button,
.login-container button,
.date-form button,
.stats-chooser button,
.pagination button,
.modal-content button {
    background: linear-gradient(180deg, var(--accent), var(--accent-hover));
    border: none;
    color: #ffffff;
    cursor: pointer;
    padding: 10px 16px;
    border-radius: 10px;
    font-weight: 700;
    transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.22);
}

.form-container button:hover,
.login-container button:hover,
.date-form button:hover,
.stats-chooser button:hover,
.pagination button:hover,
.modal-content button:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 26px rgba(37, 99, 235, 0.28);
}

.form-container button:active,
.login-container button:active,
.date-form button:active,
.stats-chooser button:active,
.pagination button:active,
.modal-content button:active {
    transform: translateY(0);
}

/* Login */
.login-container {
    background: linear-gradient(180deg, rgba(17, 24, 39, 0.98), rgba(15, 23, 42, 0.98));
    padding: 26px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(51, 65, 85, 0.7);
    max-width: 420px;
    margin: 80px auto;
}

.login-container h2 {
    margin-top: 0;
    margin-bottom: 18px;
    color: var(--heading);
}

/* Popup Messages */
.popup-message {
    position: fixed;
    top: 16px;
    right: 16px;
    background: linear-gradient(180deg, #172033, #101827);
    padding: 12px 16px;
    border-radius: 10px;
    z-index: 9999;
    opacity: 0.98;
    margin: 6px 0;
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.popup-message.success {
    border-left: 4px solid var(--success);
}

.popup-message.error {
    border-left: 4px solid var(--danger);
}

/* Stats */
.stats-container {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.stat-box {
    background: linear-gradient(180deg, rgba(23, 32, 51, 0.96), rgba(15, 23, 42, 0.96));
    border: 1px solid rgba(51, 65, 85, 0.7);
    flex: 1 1 170px;
    min-width: 170px;
    max-width: 240px;
    padding: 20px 16px;
    border-radius: 14px;
    text-align: center;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-box:hover {
    transform: translateY(-2px);
    border-color: #475569;
}

.stat-box h3 {
    margin: 0 0 10px;
    font-size: 1rem;
    color: var(--text-soft);
    font-weight: 700;
}

.stat-box p {
    margin: 0;
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--heading);
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 18px;
    margin-bottom: 18px;
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(51, 65, 85, 0.65);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

table thead {
    background: linear-gradient(180deg, #1f2b3f, #182334);
}

table thead th {
    padding: 14px 12px;
    text-align: left;
    color: var(--heading);
    font-weight: 700;
    border-bottom: 1px solid rgba(51, 65, 85, 0.65);
}

table tbody tr {
    transition: background 0.15s ease;
}

table tbody tr:nth-child(even) {
    background-color: rgba(30, 41, 59, 0.52);
}

table tbody tr:hover {
    background-color: rgba(59, 130, 246, 0.08);
}

table tbody td {
    padding: 14px 12px;
    border-bottom: 1px solid rgba(51, 65, 85, 0.45);
    color: var(--text);
}

/* Pagination */
.pagination {
    margin: 12px 0;
}

.pagination button {
    margin-right: 6px;
    padding: 8px 12px;
}

/* Filter Form */
.date-form {
    margin: 18px 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.date-form label {
    color: var(--text-soft);
    font-weight: 600;
    margin-right: 2px;
}

.date-form input {
    width: auto;
    min-width: 120px;
    margin-bottom: 0;
}

/* Stats Chooser */
.stats-chooser {
    margin-bottom: 22px;
}

.stats-chooser button {
    padding: 10px 16px;
    margin-right: 8px;
    background: linear-gradient(180deg, #1e293b, #172033);
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: none;
}

.stats-chooser button:hover {
    background: linear-gradient(180deg, #243244, #1c2740);
}

.stats-chooser button.active {
    background: linear-gradient(180deg, var(--accent), var(--accent-hover));
    color: #fff;
    border-color: transparent;
}

/* Profit Colors */
.negative-profit {
    color: var(--danger);
    font-weight: 800;
}

.positive-profit {
    color: var(--success);
    font-weight: 800;
}

.zero-profit {
    color: var(--text);
    font-weight: 800;
}

/* Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #334155;
    transition: .25s;
    border-radius: 28px;
    border: 1px solid rgba(255,255,255,0.08);
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 3px;
    background-color: #ffffff;
    transition: .25s;
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(180deg, var(--accent), var(--accent-hover));
}

input:focus + .slider {
    box-shadow: 0 0 0 4px var(--accent-soft);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.slider.round {
    border-radius: 28px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Settings Layout */
.settings-two-col {
    display: flex;
    gap: 20px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.settings-left,
.settings-right {
    border: 1px solid rgba(51, 65, 85, 0.7);
    border-radius: 14px;
    box-shadow: var(--shadow);
}

.settings-left {
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.96), rgba(23, 32, 51, 0.96));
    width: 320px;
    padding: 18px;
}

.settings-right {
    flex: 1;
    min-width: 320px;
    background: linear-gradient(180deg, rgba(17, 24, 39, 0.96), rgba(15, 23, 42, 0.96));
    padding: 18px;
}

.settings-left h4,
.settings-right h4 {
    margin-top: 0;
    color: var(--heading);
}

.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.toggle-row label {
    margin-right: 10px;
    color: var(--text);
    font-weight: 700;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(2, 6, 23, 0.72);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: linear-gradient(180deg, rgba(17, 24, 39, 0.98), rgba(15, 23, 42, 0.98));
    margin: 90px auto;
    padding: 22px;
    border-radius: 16px;
    max-width: 430px;
    box-shadow: var(--shadow);
    color: var(--text);
    position: relative;
    border: 1px solid rgba(51, 65, 85, 0.7);
}

.modal-content label {
    display: block;
    margin: 8px 0 6px;
    color: var(--text-soft);
    font-weight: 600;
}

.modal-content button {
    margin-right: 10px;
}

/* Utility polish */
a {
    color: var(--accent);
}

a:hover {
    color: #60a5fa;
}

img {
    border-radius: 6px;
}

/* Responsive */
@media (max-width: 900px) {
    header,
    footer {
        padding: 14px 18px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .header-right nav {
        flex-wrap: wrap;
        gap: 12px;
    }

    main {
        padding: 22px 18px 32px;
    }

    .stats-container {
        gap: 12px;
    }

    .stat-box {
        min-width: calc(50% - 12px);
        max-width: none;
    }
}

@media (max-width: 600px) {
    .stat-box {
        min-width: 100%;
    }

    .date-form {
        flex-direction: column;
        align-items: stretch;
    }

    .date-form input,
    .date-form button {
        width: 100%;
    }

    .settings-left,
    .settings-right {
        width: 100%;
        min-width: 100%;
    }
}