/* =====================================================================
   Installment Management System - Application UI
   Theme: professional green, inspired by the reference project.
   ===================================================================== */

:root {
    --ims-primary: #00662b;
    --ims-primary-dark: #005522;
    --ims-primary-grad: linear-gradient(135deg, #00662b 0%, #00883a 100%);
    --ims-sidebar-w: 250px;
    --ims-topbar-h: 58px;
    --ims-bg: #f2f4f6;
    --ims-border: #e4e8ec;
    --ims-text: #1f2933;
    --ims-muted: #6b7785;
}

body {
    background: var(--ims-bg);
    color: var(--ims-text);
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14.5px;
}

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

.app-main {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.app-content { flex: 1 1 auto; padding: 20px; }

/* ------------------------------ Sidebar --------------------------- */
.app-sidebar {
    width: var(--ims-sidebar-w);
    flex: 0 0 var(--ims-sidebar-w);
    background: var(--ims-primary-grad);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,.15);
}
.app-brand-logo { height: 34px; width: auto; border-radius: 6px; background: #fff; padding: 2px; }
.app-brand-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; border-radius: 8px; background: rgba(255,255,255,.2);
    font-size: 1.1rem;
}
.app-brand-text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.app-brand-name { font-weight: 700; font-size: .95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.app-brand-sub { font-size: .72rem; opacity: .8; letter-spacing: .5px; text-transform: uppercase; }

/* Text logo (shop initials) */
.brand-initials {
    font-weight: 800;
    font-size: .95rem;
    letter-spacing: .5px;
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
}
.login-mark.brand-initials { font-size: 1.5rem; }

.app-nav { flex: 1 1 auto; padding: 12px 0; }
.app-nav-heading {
    padding: 14px 18px 6px;
    font-size: .68rem;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    opacity: .7;
}
.app-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 18px;
    color: rgba(255,255,255,.88);
    text-decoration: none;
    font-size: .92rem;
    border-left: 3px solid transparent;
    transition: background .15s ease;
}
.app-nav-link i { font-size: 1.05rem; width: 18px; text-align: center; }
.app-nav-link:hover { background: rgba(255,255,255,.12); color: #fff; }
.app-nav-link.active {
    background: rgba(255,255,255,.22);
    border-left-color: #fff;
    color: #fff;
    font-weight: 600;
}

.app-sidebar-footer { border-top: 1px solid rgba(255,255,255,.15); padding: 8px 0; }
.app-sidebar-footer .app-nav-link { padding: 8px 18px; font-size: .87rem; }

.app-sidebar-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 1040;
}

/* ------------------------------ Topbar ---------------------------- */
.app-topbar {
    height: var(--ims-topbar-h);
    background: #fff;
    border-bottom: 1px solid var(--ims-border);
    display: flex;
    align-items: center;
    padding: 0 20px;
    position: sticky;
    top: 0;
    z-index: 1030;
}
.app-topbar-title { font-size: 1.05rem; font-weight: 700; margin: 0; }

.app-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--ims-border);
    background: #fff;
    color: var(--ims-muted);
    font-size: .8rem;
    display: flex;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}

/* ------------------------------ Cards ----------------------------- */
.card { border: 1px solid var(--ims-border); border-radius: 10px; }
.card-header { background: #fff; border-bottom: 1px solid var(--ims-border); font-weight: 600; }
.card-header.bg-primary { background: var(--ims-primary-grad) !important; border: none; color: #fff; }

/* --------------------------- Stat cards --------------------------- */
.stat-card {
    background: #fff;
    border: 1px solid var(--ims-border);
    border-radius: 10px;
    padding: 14px 16px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    box-shadow: 0 1px 3px rgba(16,24,40,.05);
}
.stat-card.stat-wide { display: block; }
.stat-icon {
    width: 46px; height: 46px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 1.35rem; flex: 0 0 46px;
}
.stat-value { display: block; font-size: 1.3rem; font-weight: 700; line-height: 1.1; }
.stat-wide .stat-value { margin: 4px 0 2px; font-size: 1.25rem; }
.stat-label { display: block; font-size: .76rem; color: var(--ims-muted); text-transform: uppercase; letter-spacing: .4px; }
.stat-sub { display: block; font-size: .78rem; color: var(--ims-muted); }

/* ------------------------------ Buttons --------------------------- */
.btn-primary {
    background: var(--ims-primary-grad);
    border-color: var(--ims-primary);
    color: #fff;
}
.btn-primary:hover, .btn-primary:focus {
    background: var(--ims-primary-dark);
    border-color: var(--ims-primary-dark);
    color: #fff;
}
.btn-outline-primary { color: var(--ims-primary); border-color: var(--ims-primary); }
.btn-outline-primary:hover { background: var(--ims-primary); border-color: var(--ims-primary); color: #fff; }
.text-primary { color: var(--ims-primary) !important; }
a { color: var(--ims-primary); }
a:hover { color: var(--ims-primary-dark); }

.form-label { font-weight: 600; font-size: .87rem; color: #34404d; }
.form-control:focus, .form-select:focus { border-color: var(--ims-primary); box-shadow: 0 0 0 .18rem rgba(0,102,43,.2); }

/* ------------------------------ Tables ---------------------------- */
.table > :not(caption) > * > * { padding: .55rem .7rem; }
.table thead th { font-size: .8rem; text-transform: uppercase; letter-spacing: .3px; color: #445; background: #f8fafc; }
.table-responsive { border-radius: 8px; }

/* ------------------------------ Login ----------------------------- */
body.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ims-primary-grad);
}
.login-wrapper { width: 100%; max-width: 420px; padding: 20px; }
.login-card { border: none; border-radius: 14px; overflow: hidden; }
.login-mark, .setup-mark {
    display: inline-flex; align-items: center; justify-content: center;
    width: 60px; height: 60px; border-radius: 16px;
    background: var(--ims-primary-grad); color: #fff; font-size: 1.8rem;
}
.login-logo { max-height: 88px; max-width: 200px; height: auto; }

/* ------------------------------ Misc ------------------------------ */
.section-title {
    font-size: .95rem;
    font-weight: 700;
    margin: 0 0 12px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--ims-primary);
}
.empty-state { text-align: center; color: var(--ims-muted); padding: 36px 10px; }
.empty-state i { font-size: 2.2rem; display: block; margin-bottom: 8px; }
.actions-col { text-align: right; white-space: nowrap; }
.duplicate-warning { border-left: 4px solid #f0ad4e; }

/* --------------------------- Print helper -------------------------- */
.print-only { display: none; }

/* ------------------------------ Responsive ------------------------- */
@media (max-width: 991.98px) {
    .app-sidebar {
        position: fixed;
        top: 0; left: 0; bottom: 0;
        height: 100%;
        transform: translateX(-100%);
        transition: transform .2s ease;
        z-index: 1050;
    }
    .app-sidebar.open { transform: translateX(0); }
    .app-sidebar-backdrop.show { display: block; }
    .app-content { padding: 14px; }
}