:root {
  --iocl-navy: #003399; /* Official IOCL Blue */
  --iocl-navy-dark: #002266;
  --iocl-orange: #F47920; /* Official IOCL Orange */
  --iocl-orange-hover: #D96515;
  --bg-canvas: #F4F7FE; /* Extremely light, clinical background */
  --surface: #FFFFFF; /* Pure white cards */
  --text-primary: #1E293B; /* Deep slate for readable text */
  --text-secondary: #64748B;
  --border: #E2E8F0;
  
  --green: #059669; --green-bg: #D1FAE5;
  --red: #DC2626; --red-bg: #FEE2E2;
  --amber: #D97706; --amber-bg: #FEF3C7;
  
  --sw: 260px; /* Sidebar width */
  --r: 12px; /* Standard Border Radius */
  --r2: 8px; /* Small Border Radius */
  --sh-sm: 0 1px 2px rgba(0,0,0,0.05);
  --sh-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --sh-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Inter', -apple-system, sans-serif; }
body { background: var(--bg-canvas); color: var(--text-primary); display: flex; min-height: 100vh; overflow-x: hidden; }

/* --- SIDEBAR --- */
.sidebar { width: var(--sw); background: var(--iocl-navy); border-right: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 50; box-shadow: 2px 0 10px rgba(0,0,0,0.1); }
.sidebar-header { padding: 24px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.brand { display: flex; align-items: center; gap: 14px; }

/* Logo Image Styling */
.brand-logo-img { width: 44px; height: 44px; object-fit: contain; }
.brand-logo-fallback { width: 44px; height: 44px; background: rgba(255,255,255,0.1); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: 900; color: var(--iocl-orange); font-size: 18px; border: 1px solid rgba(255,255,255,0.2); }

.brand-text { font-size: 16px; font-weight: 800; line-height: 1.2; color: #FFFFFF; letter-spacing: 0.5px; }
.brand-text span { color: var(--iocl-orange); font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }

.sidebar-nav { padding: 20px 0; flex-grow: 1; display: flex; flex-direction: column; gap: 4px; }
.sb-link { padding: 14px 24px; color: #E2E8F0; text-decoration: none; font-size: 14px; font-weight: 600; display: flex; align-items: center; border-left: 3px solid transparent; transition: 0.2s; }
.sb-link:hover { background: rgba(255,255,255,0.05); color: #FFFFFF; border-left-color: rgba(255,255,255,0.5); }
.sb-link.active { background: rgba(255,255,255,0.1); color: #FFFFFF; border-left-color: var(--iocl-orange); }

/* --- MAIN CONTENT --- */
.main-wrapper { flex: 1; margin-left: var(--sw); display: flex; flex-direction: column; }
.topbar { height: 72px; background: var(--surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 32px; position: sticky; top: 0; z-index: 40; box-shadow: var(--sh-sm); }
.tb-title { font-size: 18px; font-weight: 700; color: var(--iocl-navy); }
.user-info { display: flex; align-items: center; gap: 16px; font-size: 14px; font-weight: 600; color: var(--text-secondary); }
.content { padding: 32px; max-width: 1400px; width: 100%; margin: 0 auto; }

/* --- CARDS & GRIDS --- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); box-shadow: var(--sh-md); margin-bottom: 24px; overflow: hidden; }
.card-header { padding: 20px 24px; border-bottom: 1px solid var(--border); background: #F8FAFC; }
.card-title { font-size: 15px; font-weight: 700; color: var(--iocl-navy); display: flex; align-items: center; gap: 8px; }
.card-title::before { content: ''; display: block; width: 4px; height: 16px; background: var(--iocl-orange); border-radius: 2px; }
.card-body { padding: 24px; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; margin-bottom: 32px; }
.kpi-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); padding: 24px; display: flex; flex-direction: column; box-shadow: var(--sh-md); position: relative; overflow: hidden; border-top: 4px solid var(--iocl-navy); transition: transform 0.2s; }
.kpi-card:hover { transform: translateY(-3px); }
.kpi-title { font-size: 12px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }
.kpi-value { font-size: 36px; font-weight: 800; color: var(--text-primary); margin-top: 8px; line-height: 1; }

/* --- FORMS --- */
.fg { margin-bottom: 20px; }
.f-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.lbl { display: block; font-size: 12px; font-weight: 700; color: var(--text-secondary); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.fc { width: 100%; padding: 12px 16px; background: #FFFFFF; border: 1px solid #CBD5E1; border-radius: var(--r2); color: var(--text-primary); font-size: 14px; transition: 0.2s; }
.fc:focus { outline: none; border-color: var(--iocl-navy); box-shadow: 0 0 0 3px rgba(0, 51, 153, 0.1); }
.fc::placeholder { color: #94A3B8; }

/* --- BUTTONS --- */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: var(--r2); font-size: 14px; font-weight: 600; cursor: pointer; transition: 0.2s; border: none; text-decoration: none; }
.btn-o { background: var(--iocl-orange); color: #FFFFFF; box-shadow: 0 2px 4px rgba(244, 121, 32, 0.2); }
.btn-o:hover { background: var(--iocl-orange-hover); transform: translateY(-1px); box-shadow: 0 4px 6px rgba(244, 121, 32, 0.3); }
.btn-g { background: #F1F5F9; color: var(--text-primary); border: 1px solid #E2E8F0; }
.btn-g:hover { background: #E2E8F0; }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* --- TABLES --- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; }
th { background: #F8FAFC; padding: 14px 20px; text-align: left; font-size: 11px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 16px 20px; font-size: 13px; font-weight: 500; border-bottom: 1px solid var(--border); color: var(--text-primary); vertical-align: middle; }
tbody tr:hover { background: #F8FAFC; }

/* --- BADGES --- */
.badge { display: inline-flex; align-items: center; padding: 6px 12px; border-radius: 20px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; }
.badge-pending { background: var(--amber-bg); color: var(--amber); border: 1px solid rgba(217, 119, 6, 0.2); }
.badge-approved { background: var(--green-bg); color: var(--green); border: 1px solid rgba(5, 150, 105, 0.2); }
.badge-rejected { background: var(--red-bg); color: var(--red); border: 1px solid rgba(220, 38, 38, 0.2); }

/* --- ALERTS --- */
.alert { padding: 16px 20px; border-radius: var(--r2); margin-bottom: 24px; font-size: 14px; font-weight: 600; display: flex; align-items: center; border: 1px solid; box-shadow: var(--sh-sm); }
.alert-success { background: var(--green-bg); color: var(--green); border-color: rgba(5, 150, 105, 0.2); }
.alert-error { background: var(--red-bg); color: var(--red); border-color: rgba(220, 38, 38, 0.2); }
.alert-warning { background: var(--amber-bg); color: var(--amber); border-color: rgba(217, 119, 6, 0.2); }

/* --- TABS --- */
.tabs { display: flex; gap: 8px; margin-bottom: 24px; border-bottom: 1px solid var(--border); }
.tab-btn { background: transparent; border: none; padding: 14px 24px; font-size: 14px; font-weight: 600; color: var(--text-secondary); cursor: pointer; border-bottom: 3px solid transparent; margin-bottom: -1px; transition: 0.2s; }
.tab-btn:hover { color: var(--iocl-navy); background: rgba(0, 51, 153, 0.02); }
.tab-btn.active { color: var(--iocl-navy); border-bottom-color: var(--iocl-orange); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fade 0.3s ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* --- AUTH UI --- */
.lp { min-height: 100vh; display: flex; background: var(--bg-canvas); width: 100vw; margin-left: -var(--sw); z-index: 1000; position: relative; }
.lp-l { width: 45%; background: linear-gradient(135deg, var(--iocl-navy) 0%, var(--iocl-navy-dark) 100%); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 48px; position: relative; overflow: hidden; box-shadow: 10px 0 30px rgba(0,0,0,0.15); }
.lp-l::before { content: ''; position: absolute; width: 600px; height: 600px; border-radius: 50%; background: radial-gradient(circle, rgba(244,121,32,0.1) 0%, transparent 70%); top: -100px; right: -100px; }
.lp-r { flex: 1; display: flex; align-items: center; justify-content: center; padding: 32px; }
.lbox { width: 100%; max-width: 440px; background: var(--surface); padding: 48px; border-radius: 16px; box-shadow: var(--sh-lg); border: 1px solid rgba(0,0,0,0.05); }

/* Utility classes */
.text-navy { color: var(--iocl-navy); }
.text-orange { color: var(--iocl-orange); }

/* =========================================
   📱 MOBILE & TABLET RESPONSIVE FIXES
   ========================================= */

#sidebar-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    z-index: 9998;
    backdrop-filter: blur(2px);
}

#sidebar-overlay.open {
    display: block;
}

@media screen and (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        position: fixed;
        top: 0; left: 0; height: 100vh; z-index: 9999;
        box-shadow: 4px 0 25px rgba(0,0,0,0.5);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-wrapper {
        margin-left: 0 !important;
        width: 100%;
    }

    #mobile-menu-btn {
        display: block !important;
    }

    .f-grid {
        grid-template-columns: 1fr !important;
        display: flex; flex-direction: column; gap: 16px;
    }
    
    .kpi-grid { grid-template-columns: 1fr 1fr !important; }
    .tabs { flex-wrap: wrap; }
    .tab-btn { flex: 1 1 45%; text-align: center; }

    .lp { flex-direction: column; margin-left: 0 !important; }
    .lp-l { width: 100%; padding: 32px; }
    .lp-l::before { display: none; }
}

@media screen and (max-width: 600px) {
    /* 1. Reclaim dead screen space on small phones */
    .content { padding: 16px 12px; }
    .card-header { padding: 16px 12px; }
    .card-body { padding: 16px 12px; }
    .lbox { padding: 32px 24px; }
    .topbar { padding: 12px 16px; }

    /* 2. Stack elements nicely */
    .kpi-grid { grid-template-columns: 1fr !important; gap: 12px; }
    .hide-mobile { display: none !important; }
    .tb-title { font-size: 15px; }

    /* 3. Tighten form gaps to reduce vertical scrolling */
    .fg { margin-bottom: 14px; }
    .fc { padding: 10px 12px; }
    .lbl { margin-bottom: 6px; }

    /* 4. COMPRESS TABLES SO THEY FIT (OR SCROLL SMOOTHLY) */
    th { 
        padding: 10px 8px; 
        font-size: 10px; 
        letter-spacing: 0; 
    }
    td { 
        padding: 10px 8px; 
        font-size: 12px; 
    }
    .btn-sm { 
        padding: 6px 10px; 
        font-size: 11px; 
        white-space: nowrap; /* Forces buttons to stay on one line */
    }

    /* 5. Edge-to-edge native mobile scroll for tables */
    .table-wrap {
        margin-left: -12px; /* Pull table to left edge of screen */
        margin-right: -12px; /* Pull table to right edge of screen */
        padding-left: 12px;
        padding-right: 12px;
        -webkit-overflow-scrolling: touch; /* Butter-smooth iOS scroll momentum */
    }
}