:root{
    --nav:#10243e;
    --nav-soft:#1b385e;
    --bg:#f4f7fb;
    --panel:#fff;
    --text:#172437;
    --muted:#6b7788;
    --line:#e3e9f1;
    --blue:#2473d4;
    --shadow:0 12px 35px rgba(15,35,60,.08)
}

*{
    box-sizing:border-box
}

body{
    margin:0;
    font-family:Arial,sans-serif;
    color:var(--text);
    background:var(--bg)
}

a{
    text-decoration:none;
    color:inherit
}

.app-shell{
    display:flex;
    min-height:100vh
}

/* =========================================================
   SIDEBAR
   Fixed sidebar with independent vertical scrolling
   ========================================================= */

.sidebar{
    position:fixed;
    top:0;
    bottom:0;
    left:0;

    width:235px;

    height:100vh;
    height:100dvh;

    background:var(--nav);
    color:#dce8f8;

    padding:22px 16px;

    display:flex;
    flex-direction:column;

    overflow-y:auto;
    overflow-x:hidden;

    overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;

    scrollbar-width:thin;
    scrollbar-color:#46698f transparent
}

/* Chrome / Edge / Safari scrollbar */

.sidebar::-webkit-scrollbar{
    width:6px
}

.sidebar::-webkit-scrollbar-track{
    background:transparent
}

.sidebar::-webkit-scrollbar-thumb{
    background:#46698f;
    border-radius:10px
}

.sidebar::-webkit-scrollbar-thumb:hover{
    background:#5d7fa5
}

.sidebar-brand{
    display:grid;
    gap:2px;
    margin-bottom:32px;
    flex-shrink:0
}

.sidebar-brand span{
    font-weight:800;
    font-size:25px;
    letter-spacing:2px
}

.sidebar-brand small{
    color:#a9bdd7
}

.sidebar nav{
    display:grid;
    gap:6px;
    flex-shrink:0
}

.sidebar nav a{
    padding:12px;
    border-radius:8px;
    font-size:14px
}

.sidebar nav a:hover,
.sidebar nav a.active{
    background:var(--nav-soft);
    color:#fff
}

.sidebar-footer{
    margin-top:auto;
    padding-top:24px;
    padding-bottom:10px;
    color:#a9bdd7;
    font-size:13px;
    flex-shrink:0
}

/* =========================================================
   MAIN AREA
   ========================================================= */

.main-area{
    margin-left:235px;
    width:calc(100% - 235px)
}

.topbar{
    min-height:70px;
    background:#fff;
    border-bottom:1px solid var(--line);
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:12px 28px;
    gap:20px
}

.project-switcher{
    display:flex;
    align-items:center;
    gap:10px;
    flex:1
}

.project-switcher span{
    font-size:12px;
    color:var(--muted);
    text-transform:uppercase;
    letter-spacing:.5px
}

.project-switcher select,
.form-grid select,
.form-grid input,
.form-grid textarea,
.login-card input{
    border:1px solid #ccd7e5;
    border-radius:7px;
    background:#fff;
    padding:10px;
    max-width:360px
}

.form-grid textarea{
    min-height:100px;
    resize:vertical
}

.user-menu{
    display:flex;
    gap:14px;
    align-items:center;
    font-size:14px
}

.user-menu a{
    color:var(--blue)
}

.menu-button{
    display:none
}

.sidebar-close{
    display:none
}

.sidebar-backdrop{
    display:none
}

.content{
    padding:28px
}

/* =========================================================
   PAGE HEADING
   ========================================================= */

.page-heading{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-bottom:20px
}

.page-heading h1{
    margin:0 0 6px;
    font-size:27px
}

.page-heading p,
.muted{
    margin:0;
    color:var(--muted);
    line-height:1.5
}

/* =========================================================
   STATUS / BADGES
   ========================================================= */

.status-pill,
.badge{
    display:inline-flex;
    border-radius:20px;
    font-size:12px;
    padding:5px 9px
}

.status-pill,
.badge.blue{
    background:#e8f2ff;
    color:#1b65bd
}

.badge.amber{
    background:#fff2d6;
    color:#a06400
}

.badge.red{
    background:#ffe4e4;
    color:#b62d2d
}

/* =========================================================
   DASHBOARD STATS
   ========================================================= */

.stat-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(145px,1fr));
    gap:14px
}

.stat-card,
.panel,
.project-card{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:12px;
    box-shadow:var(--shadow)
}

.stat-card{
    padding:18px;
    display:grid;
    gap:10px
}

.stat-card span,
.stat-card small{
    color:var(--muted);
    font-size:12px
}

.stat-card strong{
    font-size:30px
}

.dashboard-grid{
    display:grid;
    grid-template-columns:1.35fr 1fr;
    gap:16px;
    margin-top:18px
}

/* =========================================================
   PANELS
   ========================================================= */

.panel{
    padding:18px;
    margin-bottom:18px
}

.panel h2{
    font-size:17px;
    margin:0 0 15px
}

.panel-title{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-bottom:9px
}

.panel-title h2{
    margin:0
}

.panel-title span{
    font-size:12px;
    color:var(--muted)
}

/* =========================================================
   ACTION ROWS
   ========================================================= */

.action-row{
    display:grid;
    grid-template-columns:1fr auto;
    gap:7px;
    padding:13px 0;
    border-top:1px solid var(--line);
    font-size:14px
}

.action-row small{
    color:var(--muted)
}

/* =========================================================
   MODULE LIST
   ========================================================= */

.module-list{
    display:grid
}

.module-list span{
    display:flex;
    justify-content:space-between;
    padding:14px 0;
    border-top:1px solid var(--line);
    font-size:14px
}

.module-list b{
    color:var(--blue)
}

/* =========================================================
   FORMS
   ========================================================= */

.form-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:14px;
    align-items:end
}

.dynamic-form{
    margin-top:18px
}

.form-grid label,
.login-card label{
    display:grid;
    gap:6px;
    font-size:13px;
    color:var(--muted)
}

/* =========================================================
   BUTTONS
   ========================================================= */

.button{
    display:inline-flex;
    justify-content:center;
    border:0;
    border-radius:7px;
    padding:11px 15px;
    cursor:pointer;
    font-weight:700
}

.button.primary{
    color:#fff;
    background:var(--blue)
}

.button.secondary{
    color:var(--blue);
    background:#e8f2ff
}

.button.danger{
    color:#a12626;
    background:#ffe4e4
}

.full{
    width:100%
}

/* =========================================================
   TABLES
   ========================================================= */

.table-wrap{
    overflow:auto
}

table{
    border-collapse:collapse;
    width:100%;
    font-size:13px
}

th,
td{
    text-align:left;
    padding:12px;
    border-bottom:1px solid var(--line);
    white-space:nowrap
}

th{
    color:var(--muted);
    font-size:11px;
    text-transform:uppercase
}

.pagination{
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
    margin-top:14px
}

/* =========================================================
   PROJECT CARDS
   ========================================================= */

.card-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:16px
}

.project-card{
    display:grid;
    justify-items:start;
    gap:11px;
    padding:18px
}

.project-card h2,
.project-card p{
    margin:0
}

.project-card small{
    color:var(--muted)
}

/* =========================================================
   DETAILS
   ========================================================= */

.detail-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px
}

.detail-grid div{
    display:grid;
    gap:6px
}

.detail-grid small{
    color:var(--muted)
}

/* =========================================================
   FLASH MESSAGES
   ========================================================= */

.flash{
    padding:11px 13px;
    margin-bottom:14px;
    border-radius:7px;
    font-size:13px
}

.flash.warning{
    background:#fff2d6;
    color:#845500
}

.flash.error{
    background:#ffe4e4;
    color:#992626
}

.flash.success{
    background:#def8e5;
    color:#19743a
}

/* =========================================================
   LOGIN PAGE
   ========================================================= */

.login-body{
    min-height:100vh;
    display:grid;
    place-items:center;
    background:linear-gradient(135deg,#10243e,#24558d)
}

.login-card{
    width:min(420px,calc(100% - 32px));
    background:#fff;
    border-radius:14px;
    padding:30px;
    box-shadow:var(--shadow)
}

.brand-mark{
    display:inline-flex;
    background:var(--nav);
    color:#fff;
    border-radius:8px;
    padding:8px;
    font-weight:800;
    letter-spacing:2px
}

.login-card h1{
    font-size:24px;
    margin:17px 0 8px
}

.login-card form{
    display:grid;
    gap:14px;
    margin-top:18px
}

.demo-note{
    background:#eef5ff;
    color:#31597f;
    border-radius:8px;
    padding:11px;
    margin-top:14px;
    font-size:13px;
    line-height:1.5
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media(max-width:1100px){

    .stat-grid{
        grid-template-columns:repeat(3,1fr)
    }

    .form-grid{
        grid-template-columns:repeat(2,1fr)
    }
}

@media(max-width:760px){

    .sidebar{
        transform:translateX(-100%);
        transition:transform .2s ease;
        z-index:1001
    }

    .nav-open .sidebar{
        transform:translateX(0)
    }

    .sidebar-close{
        display:flex;
        position:absolute;
        top:12px;
        right:12px;
        width:36px;
        height:36px;
        align-items:center;
        justify-content:center;
        border:0;
        border-radius:8px;
        background:rgba(255,255,255,.12);
        color:#fff;
        font-size:28px;
        line-height:1;
        cursor:pointer;
        z-index:1002
    }

    .sidebar-close:hover{
        background:rgba(255,255,255,.20)
    }

    .sidebar-backdrop{
        display:none;
        position:fixed;
        inset:0;
        border:0;
        padding:0;
        background:rgba(15,35,60,.35);
        z-index:1000;
        cursor:pointer
    }

    .nav-open .sidebar-backdrop{
        display:block
    }

    .main-area{
        margin-left:0;
        width:100%
    }

    .topbar{
        padding:12px 16px;
        flex-wrap:wrap
    }

    .menu-button{
        display:block;
        border:0;
        border-radius:6px;
        padding:9px;
        background:var(--nav);
        color:#fff;
        cursor:pointer
    }

    .project-switcher{
        order:3;
        width:100%
    }

    .project-switcher span{
        display:none
    }

    .project-switcher select{
        width:100%;
        max-width:none
    }

    .content{
        padding:18px
    }

    .stat-grid,
    .dashboard-grid,
    .card-grid,
    .form-grid,
    .detail-grid{
        grid-template-columns:1fr 1fr
    }

    .user-menu span{
        display:none
    }
}

@media(max-width:480px){

    .stat-grid,
    .dashboard-grid,
    .card-grid,
    .form-grid,
    .detail-grid{
        grid-template-columns:1fr
    }
}