/* =========================================================
   PROFESSIONAL LIBRARY PORTAL
   GREEN + WHITE INSTITUTIONAL THEME
   ========================================================= */

:root {
    --green-950: rgb(20, 95, 30);
    --green-900: rgb(25, 120, 35);
    --green-800: rgb(30, 145, 44);
    --green-700: rgb(36, 175, 54);
    --green-600: rgb(45, 190, 65);
    --green-500: rgb(65, 205, 80);

    --green-100: rgb(220, 250, 224);
    --green-50: rgb(240, 253, 242);

    --white: #ffffff;

    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;

    --page-bg: #f7faf8;

    --danger: #dc2626;
    --warning: #d97706;
    --success: rgb(36, 175, 54);
    --info: #2563eb;

    --sidebar-width: 240px;
    --navbar-height: 72px;

    --radius: 14px;

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, .05);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
}


/* =========================================================
   RESET
   ========================================================= */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    background: var(--page-bg);
    color: var(--slate-700);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
}

button,
input,
select,
textarea {
    font-family: inherit;
}


/* =========================================================
   MAIN WRAPPER
   ========================================================= */

.wrapper {
    min-height: 100vh;
    display: flex;
    width: 100%;
}

.main-content {
    min-width: 0;
    flex: 1;
    min-height: 100vh;

    display: flex;
    flex-direction: column;

    margin-left: var(--sidebar-width) !important;
    padding-left: 0 !important;
}


/* =========================================================
   SIDEBAR
   ========================================================= */

.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;

    position: fixed;
    inset: 0 auto 0 0;

    z-index: 1000;

    display: flex;
    flex-direction: column;

    background: var(--white);

    border-right: 1px solid var(--slate-200);

    box-shadow: 3px 0 18px rgba(15, 23, 42, .04);
}


/* Sidebar Header */

.sidebar-header {
    padding: 22px 18px 18px;

    border-bottom: 1px solid var(--slate-100);

    position: relative;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}


/* Logo */

.sidebar-logo {
    width: 48px;
    height: 48px;

    flex: 0 0 48px;

    display: grid;
    place-items: center;

    border-radius: 12px;

    background: var(--green-50);

    border: 1px solid var(--green-100);

    overflow: hidden;
}

.sidebar-logo img {
    max-width: 80%;
    max-height: 80%;

    object-fit: contain;
}

.logo-fallback {
    color: var(--green-700);

    font-weight: 800;
    font-size: 22px;
}


/* Sidebar Title */

.sidebar-header h3 {
    color: var(--green-900);

    font-size: 1rem;
    line-height: 1.2;
}

.sidebar-header span {
    color: var(--slate-500);

    font-size: .72rem;
}


/* Sidebar Close Button */

.sidebar-close-btn {
    display: none;

    position: absolute;
    top: 14px;
    right: 12px;

    border: 0;

    background: transparent;

    color: var(--slate-600);

    font-size: 1.5rem;

    cursor: pointer;
}

.sidebar-close-btn:hover {
    color: var(--danger);
}


/* =========================================================
   SIDEBAR MENU
   ========================================================= */

.sidebar-section-title {
    padding: 18px 20px 8px;

    text-transform: uppercase;

    letter-spacing: .08em;

    color: var(--slate-500);

    font-size: .68rem;

    font-weight: 700;
}

.sidebar-menu {
    list-style: none;

    padding: 5px 12px 12px;

    margin: 0;

    overflow-y: auto;

    flex: 1;
}

.sidebar-menu li {
    margin: 3px 0;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;

    gap: 12px;

    padding: 11px 12px;

    border-radius: 10px;

    text-decoration: none;

    color: var(--slate-600);

    font-size: .88rem;

    font-weight: 500;

    transition:
        background .2s ease,
        color .2s ease,
        transform .2s ease;
}

.sidebar-menu li a span {
    width: 26px;

    text-align: center;

    font-size: 1rem;
}


/* Hover */

.sidebar-menu li a:hover {
    background: var(--green-50);

    color: var(--green-800);

    transform: translateX(2px);
}


/* Active */

.sidebar-menu li a.active {
    background: var(--green-100);

    color: var(--green-900);

    font-weight: 700;

    box-shadow: inset 3px 0 0 var(--green-600);
}


/* =========================================================
   LOGOUT
   ========================================================= */

.logout-link {
    margin-top: 12px !important;

    padding-top: 12px;

    border-top: 1px solid var(--slate-100);
}

.logout-link a {
    color: var(--slate-600);
}

.logout-link a:hover {
    background: #fef2f2 !important;

    color: var(--danger) !important;

    transform: translateX(2px);
}


/* =========================================================
   SIDEBAR FOOTER
   ========================================================= */

.sidebar-footer {
    margin: 0 14px 16px;

    padding: 10px 12px;

    border-radius: 10px;

    background: var(--green-50);

    color: var(--green-800);

    font-size: .72rem;

    font-weight: 600;
}

.status-dot {
    display: inline-block;

    width: 7px;
    height: 7px;

    margin-right: 6px;

    border-radius: 50%;

    background: #22c55e;
}


/* =========================================================
   TOP NAVBAR
   ========================================================= */

.top-navbar {
    height: var(--navbar-height);

    position: sticky;
    top: 0;

    z-index: 900;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 28px;

    background: rgba(255, 255, 255, .96);

    backdrop-filter: blur(10px);

    border-bottom: 1px solid var(--slate-200);

    box-shadow: 0 2px 8px rgba(15, 23, 42, .03);
}

.navbar-left {
    display: flex;
    align-items: center;

    gap: 14px;
}


/* =========================================================
   MOBILE TOGGLE
   ========================================================= */

.mobile-toggle-btn {
    display: none;

    border: 0;

    background: var(--green-700);

    color: var(--white);

    width: 40px;
    height: 40px;

    border-radius: 10px;

    cursor: pointer;

    font-size: 1.25rem;

    transition:
        background .2s ease,
        transform .2s ease;
}

.mobile-toggle-btn:hover {
    background: var(--green-800);

    transform: translateY(-1px);
}


/* =========================================================
   NAVBAR BRANDING
   ========================================================= */

.navbar-branding {
    display: flex;
    align-items: center;

    gap: 10px;

    font-weight: 700;

    font-size: .92rem;
}

.navbar-branding .inst-name {
    color: var(--slate-700);
}

.navbar-branding .portal-name {
    color: var(--green-700);
}

.navbar-separator {
    color: var(--slate-300);
}


/* =========================================================
   USER PROFILE
   ========================================================= */

.user-profile-badge {
    display: flex;
    align-items: center;

    gap: 10px;
}

.user-avatar {
    width: 38px;
    height: 38px;

    display: grid;
    place-items: center;

    border-radius: 50%;

    background: var(--green-100);

    color: var(--green-800);

    font-weight: 800;
}

.user-details {
    display: flex;
    flex-direction: column;

    line-height: 1.2;
}

.user-name {
    color: var(--slate-900);

    font-size: .82rem;

    font-weight: 700;
}

.user-role {
    color: var(--slate-500);

    font-size: .68rem;

    margin-top: 3px;
}


/* =========================================================
   ROLE BADGES
   ========================================================= */

.role-badge {
    padding: 5px 10px;

    border-radius: 999px;

    font-size: .66rem;

    font-weight: 800;

    text-transform: uppercase;

    letter-spacing: .04em;
}

.role-admin {
    background: #fee2e2;
    color: #991b1b;
}

.role-librarian {
    background: #dbeafe;
    color: #1e40af;
}

.role-student {
    background: var(--green-100);
    color: var(--green-800);
}

.role-guest {
    background: var(--slate-100);
    color: var(--slate-600);
}


/* =========================================================
   SIDEBAR OVERLAY
   ========================================================= */

.sidebar-overlay {
    display: none;

    position: fixed;

    inset: 0;

    z-index: 999;

    background: rgba(15, 23, 42, .48);

    opacity: 0;

    transition: opacity .25s ease;
}

.sidebar-overlay.active {
    display: block;

    opacity: 1;
}


/* =========================================================
   MAIN CONTAINER & PAGE ALIGNMENT (FULL WIDTH FIX)
   ========================================================= */

.container {
    width: 100% !important;
    max-width: 100% !important;

    margin: 0 !important;

    padding-left: 2px !important;  /* 2px distance from sidebar line */
    padding-right: 20px !important;
    padding-top: 24px !important;
    padding-bottom: 24px !important;

    flex: 1;
}

/* Force table containers to expand to full width without centering margin */
.card,
.table-responsive,
.dashboard-card,
table {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: 0 !important;
}


/* =========================================================
   FOOTER
   ========================================================= */

.footer {
    display: flex;

    justify-content: space-between;
    align-items: center;

    gap: 20px;

    padding: 18px 28px;

    background: var(--white);

    border-top: 1px solid var(--slate-200);

    color: var(--slate-500);

    font-size: .76rem;
}

.footer strong {
    color: var(--green-800);
}

.footer p {
    margin: 0;
}


/* =========================================================
   PAGE HEADER
   ========================================================= */

.page-header {
    display: flex;

    align-items: center;

    justify-content: space-between;

    gap: 20px;

    margin-bottom: 24px;
    margin-left: 0 !important;
    padding-left: 0 !important;
}

.page-header h1 {
    color: var(--slate-900);

    font-size: 1.55rem;

    font-weight: 800;
}

.page-header p {
    color: var(--slate-500);

    font-size: .85rem;

    margin-top: 4px;
}


/* =========================================================
   GENERAL CARD
   ========================================================= */

.card {
    background: var(--white);

    border: 1px solid var(--slate-200);

    border-radius: var(--radius);

    box-shadow: var(--shadow-sm);

    padding: 22px;
}


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

.btn {
    display: inline-flex;

    align-items: center;

    justify-content: center;

    gap: 7px;

    min-height: 42px;

    border: 1px solid transparent;

    border-radius: 9px;

    padding: 10px 16px;

    cursor: pointer;

    text-decoration: none;

    font-weight: 700;

    font-size: .82rem;

    line-height: 1;

    transition:
        background .2s ease,
        border-color .2s ease,
        color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}


/* PRIMARY GREEN BUTTON */

.btn-primary {
    background: var(--green-700) !important;

    color: var(--white) !important;

    border-color: var(--green-700) !important;

    box-shadow: 0 4px 10px rgba(10, 117, 68, .18);
}

.btn-primary:hover {
    background: var(--green-800) !important;

    border-color: var(--green-800) !important;

    color: var(--white) !important;

    transform: translateY(-1px);

    box-shadow: 0 6px 15px rgba(10, 117, 68, .22);
}


/* GREEN LIGHT BUTTON */

.btn-success {
    background: var(--green-600) !important;

    color: var(--white) !important;

    border-color: var(--green-600) !important;
}

.btn-success:hover {
    background: var(--green-700) !important;

    border-color: var(--green-700) !important;

    color: var(--white) !important;
}


/* SECONDARY BUTTON */

.btn-secondary {
    background: var(--white);

    color: var(--green-700);

    border-color: var(--green-600);
}

.btn-secondary:hover {
    background: var(--green-50);

    color: var(--green-800);

    border-color: var(--green-700);
}


/* DANGER BUTTON */

.btn-danger {
    background: var(--danger);

    color: var(--white);

    border-color: var(--danger);
}

.btn-danger:hover {
    background: #b91c1c;

    border-color: #b91c1c;

    color: var(--white);
}


/* BUTTON DISABLED */

.btn:disabled,
.btn.disabled {
    opacity: .55;

    cursor: not-allowed;

    transform: none;

    box-shadow: none;
}


/* FULL WIDTH BUTTON */

.btn-block {
    width: 100%;
}


/* =========================================================
   FORM CONTROLS
   ========================================================= */

.form-control,
.form-select {
    width: 100%;

    min-height: 44px;

    padding: 10px 12px;

    border: 1px solid var(--slate-300);

    border-radius: 99px;

    background: var(--white);

    color: var(--slate-700);

    outline: none;

    transition:
        border-color .2s ease,
        box-shadow .2s ease;
}

.form-control::placeholder {
    color: var(--slate-400);
}

.form-control:hover,
.form-select:hover {
    border-color: var(--slate-400);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--green-500);

    box-shadow: 0 0 0 3px rgba(22, 160, 93, .12);
}

.form-control:disabled,
.form-select:disabled {
    background: var(--slate-100);

    color: var(--slate-400);

    cursor: not-allowed;
}


/* =========================================================
   ALERTS
   ========================================================= */

.alert-dismissible {
    transition: opacity .3s ease;
}


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

@media (max-width: 1100px) {

    .container {
        padding: 24px;
    }

    .top-navbar {
        padding: 0 22px;
    }
}


@media (max-width: 768px) {

    .sidebar {
        transform: translateX(-100%);

        transition: transform .25s ease;

        box-shadow: 8px 0 25px rgba(15, 23, 42, .12);
    }

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

    .sidebar-close-btn {
        display: block;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .mobile-toggle-btn {
        display: inline-flex;

        align-items: center;

        justify-content: center;
    }

    .top-navbar {
        height: 64px;

        padding: 0 16px;
    }

    .navbar-branding .inst-name,
    .navbar-separator {
        display: none;
    }

    .navbar-branding .portal-name {
        font-size: .84rem;
    }

    .user-details {
        display: none;
    }

    .role-badge {
        display: none;
    }

    .container {
        padding: 20px 16px !important;
    }

    .page-header {
        align-items: flex-start;

        flex-direction: column;

        gap: 8px;

        margin-bottom: 20px;
    }

    .page-header h1 {
        font-size: 1.3rem;
    }

    .footer {
        padding: 16px;

        flex-direction: column;

        text-align: center;
    }
}


@media (max-width: 480px) {

    .container {
        padding: 16px 12px !important;
    }

    .top-navbar {
        padding: 0 12px;
    }

    .navbar-branding .portal-name {
        font-size: .78rem;
    }

    .mobile-toggle-btn {
        width: 38px;
        height: 38px;
    }

    .card {
        padding: 17px;

        border-radius: 12px;
    }

    .btn {
        min-height: 42px;

        padding: 10px 14px;
    }

    .page-header h1 {
        font-size: 1.2rem;
    }
}