:root {
    --primary-color: #0d47a1;
    --primary-light: #1976d2;
    --main-bg-color: #EDF2F7;
    --accent-color: #4CAF50;
    --danger-color: #d32f2f;
    --warning-color: #ffa000;
    --text-color: #1A202C;
    --text-light: #718096;
    --border-color: #e0e0e0;
    --white-color: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --login-bg: #62a4f5;
    --login-button-bg: #4263EB;
}

/* --- GENERAL & TYPOGRAPHY --- */
body {
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    margin: 0;
    background-color: var(--main-bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    -webkit-text-size-adjust: 100%; /* Prevents font scaling on mobile */
}

/* --- LOGIN SCREEN --- */
#login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    background-color: var(--login-bg);
    padding: 15px;
}
.login-container {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background: var(--white-color);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    text-align: center;
}
.login-icon {
    color: var(--login-button-bg);
    margin-bottom: 20px;
}
.login-container h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 5px 0;
}
.login-container .subtitle {
    color: var(--text-light);
    margin-bottom: 30px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.login-container input {
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-sizing: border-box;
    background-color: #f8f9fa;
    transition: all 0.3s;
}
.login-container input:focus {
    outline: none;
    border-color: var(--login-button-bg);
    background-color: var(--white-color);
    box-shadow: 0 0 0 3px rgba(66, 99, 235, 0.2);
}
#login-form button {
    width: 100%;
    padding: 14px;
    background-color: var(--login-button-bg);
    color: var(--white-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
#login-form button:hover {
    opacity: 0.9;
    transform: none;
}
.login-container .helper-text {
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--text-light);
}
#login-error {
    color: var(--danger-color);
    margin-top: 15px;
    font-size: 0.9em;
    display: none;
}

/* --- MAIN APP LAYOUT --- */
#main-app {
    display: none;
    flex-direction: column;
    width: 100%;
}

.app-header-container {
    position: sticky;
    top: 0;
    z-index: 999;
    background-color: var(--white-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 25px;
    border-bottom: 1px solid var(--border-color);
}
.user-info { font-size: 0.9em; color: var(--text-light); }
.user-info span { font-weight: 700; color: var(--primary-color); }

.header-title { text-align: center; padding: 20px 25px; }
.header-title h1 { color: var(--primary-color); margin: 0 0 5px 0; font-size: 1.8rem; }
.header-title h2 { font-size: 1.1rem; font-weight: 500; color: var(--text-light); margin: 0; }

main {
    padding: 25px;
    flex-grow: 1;
}

/* --- TABS --- */
.tab-container {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    padding: 0 25px;
}
.tab-button {
    padding: 15px 25px;
    cursor: pointer;
    border: none;
    border-bottom: 3px solid transparent;
    background-color: transparent;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-light);
    transition: all 0.3s ease;
    margin-bottom: -1px;
    white-space: nowrap; /* Prevent tabs from breaking line */
}
.tab-button:hover {
    color: var(--primary-color);
    background-color: #f0f0f0;
}
.tab-button.active {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* --- CARD & SECTION STYLING --- */
.card {
    background: var(--white-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    overflow: hidden;
}
.card-header {
    background-color: #f7f9fc;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.card-header h2, .card-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: 700;
}
.card-body {
    padding: 20px;
}

/* --- BUTTONS --- */
button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 10px;
    transition: all 0.2s;
}
button:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}
button.primary { background-color: var(--primary-light); color: white; }
button.accent { background-color: var(--accent-color); color: white; }
button.danger { background-color: var(--danger-color); color: white; }
button.warning { background-color: var(--warning-color); color: var(--text-color); }
button.secondary { background-color: #BDBDBD; color: var(--text-color); }
button:disabled {
    background-color: #e0e0e0;
    cursor: not-allowed;
    opacity: 0.7;
    transform: none;
}
.header-buttons button { padding: 8px 12px; font-size: 12px; }

/* --- FORMS & LAYOUTS --- */
.form-group {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}
.form-group label {
    width: 200px;
    font-weight: 700;
    color: var(--text-light);
}
.form-group input, .form-group select, .form-group textarea {
    flex: 1;
    min-width: 250px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: border-color 0.3s, box-shadow 0.3s;
    background-color: #fcfeff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

.radio-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on small screens */
    gap: 8px 25px; /* Row and column gap */
}
.radio-option {
    display: flex;
    align-items: center;
    gap: 8px;
}
.radio-option label {
    width: auto;
    font-weight: 500;
    color: var(--text-color);
}

.stages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

fieldset {
    border: 1px solid var(--border-color);
    padding: 20px;
    margin-bottom: 0;
    border-radius: 5px;
    background-color: #fafafa;
}
legend {
    font-weight: 700;
    color: var(--primary-light);
    padding: 0 10px;
}
fieldset:disabled { opacity: 0.6; background-color: #f5f5f5; }
.child-ship-list { margin-left: 20px; list-style-type: disc; }
   
/* --- SEARCH & PAGINATION --- */
.search-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 15px;
}
.search-bar input {
    flex-grow: 1;
    padding: 14px;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
    margin-bottom: 0;
}
.search-bar button {
    flex-shrink: 0;
    padding: 10px 18px;
    margin-right: 0;
}
.pagination { 
    margin-top: 20px; 
    text-align: center; 
}
/* --- TABLES --- */
.table-container {
    width: 100%;
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    border: 1px solid var(--border-color);
    padding: 12px 15px;
    text-align: left;
    vertical-align: middle;
}
th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85em;
}
tr:nth-child(even) { background-color: #f9f9f9; }
tr:hover { background-color: #e3f2fd; }
tr.group-summary { background-color: #e8f5e9 !important; font-weight: 700; }
td.actions-cell {
    text-align: center;
}
td.actions-cell button {
    margin: 2px;
    padding: 6px 10px;
    font-size: 0.8rem;
}

/* --- DASHBOARD --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}
.status-column {
    display: flex;
    flex-direction: column;
}
.status-column .card-header {
    background-color: var(--primary-light);
}
 .status-column .card-header h3 {
     color: var(--white-color);
 }
.ship-count {
    background-color: rgba(255,255,255,0.3);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.9rem;
    margin-left: 10px;
}
.notification-list {
    list-style-type: none;
    padding: 0;
    margin: 0;
    height: 400px;
    overflow-y: auto;
    flex-grow: 1;
}
.notification-list li:first-child .notification-item { border-top: none; }
.notification-item {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
}
.notification-item span { font-weight: 700; color: var(--text-color); }
.notification-item br + * { font-size: 0.9em; color: var(--text-light); }

/* --- STATISTICS --- */
.stats-display {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
}
.stats-info { flex: 2; min-width: 300px; }
.stats-info p { margin: 0 0 10px 0; font-size: 1.1rem; }
.stats-info strong { color: var(--primary-color); font-weight: 700; }
.stats-chart { flex: 1; max-width: 420px; max-height: 420px; margin: auto; }

/* --- MODAL --- */
.modal {
    display: none; position: fixed; z-index: 1000;
    left: 0; top: 0; width: 100%; height: 100%;
    overflow: auto; background-color: rgba(0,0,0,0.5);
    align-items: center; justify-content: center;
}
.modal.active { display: flex; }
.modal-content {
    background-color: var(--white-color);
    padding: 25px;
    border: none;
    width: 90%;
    max-width: 700px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-content h3, .modal-content h4 {
    color: var(--primary-color);
    margin-top: 0;
}
.close-button {
    color: #aaa; position: absolute; top: 10px; right: 15px;
    font-size: 28px; font-weight: bold;
}
.close-button:hover, .close-button:focus {
    color: black; text-decoration: none; cursor: pointer;
}

/* --- HISTORY MODAL SPECIFIC --- */
#history-content .history-item {
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    margin-bottom: 15px;
    background-color: #f9f9f9;
}
 #history-content .history-item h4 {
    margin-top: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 10px;
 }
#history-content p {
    margin: 5px 0;
    font-size: 0.95rem;
}


/* MOBILE RESPONSIVE STYLES */
@media (max-width: 768px) {
    main { padding: 15px; }
    .header-title h1 { font-size: 1.4rem; }
    .header-title h2 { font-size: 0.9rem; }
    .app-header { flex-direction: column; gap: 10px; padding: 15px; }
    .tab-container {
        overflow-x: auto;
        padding: 0 15px;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }
    .tab-container::-webkit-scrollbar { display: none; }
    .tab-button { padding: 12px 15px; font-size: 0.9rem; }
    .card-header { flex-direction: column; align-items: flex-start; gap: 10px; }
    .card-header h2, .card-header h3 { font-size: 1.1rem; }
    .card-body { padding: 15px; }
    .form-group { flex-direction: column; align-items: stretch; gap: 5px; }
    .form-group label { width: 100%; margin-bottom: 2px; }
    .stages-grid { grid-template-columns: 1fr; }
    .stats-display { flex-direction: column; }
    th, td { padding: 10px 8px; font-size: 0.9em; }
    .login-container { padding: 25px; }
    .modal-content { width: 95%; }
    .search-bar { flex-wrap: wrap; }
}
#demdes-forecast th {
    text-align: center;
    vertical-align: middle;
}