/* ==========================================================================
   CERN Event & Attendance Management WebApp Style System
   Strictly aligned with CERN Visual Identity (Blue, Open Sans, Source Sans)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Open+Sans:ital,wght@0,300..800;1,300..800&family=Source+Sans+3:ital,wght@0,200..900;1,200..900&display=swap');

:root {
    --cern-blue: #0033A0;
    --cern-blue-hover: #00226B;
    --cern-blue-light: #EBF1FF;
    --cern-dark: #001A4A;
    --cern-darker: #000F2E;
    --cern-toolbar: #0D0E10;
    --cern-text-dark: #1A202C;
    --cern-text-light: #4A5568;
    --cern-bg: #F7FAFC;
    --cern-white: #FFFFFF;
    --cern-border: #E2E8F0;
    --cern-success: #2F855A;
    --cern-success-light: #C6F6D5;
    --cern-warning: #C05621;
    --cern-warning-light: #FEEBC8;
    --cern-danger: #C53030;
    --cern-danger-light: #FED7D7;
    --font-heading: 'Open Sans', sans-serif;
    --font-body: 'Source Sans 3', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--cern-text-dark);
    background-color: var(--cern-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--cern-dark);
    line-height: 1.25;
}

a {
    color: var(--cern-blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--cern-blue-hover);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--cern-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--cern-blue);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--cern-blue-hover);
}

/* CERN Toolbar (Simulates CERN's mandatory toolbar) */
.cern-toolbar {
    background-color: var(--cern-toolbar);
    color: #A0AEC0;
    font-size: 12px;
    padding: 8px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--cern-blue);
}

.cern-toolbar .toolbar-links a {
    color: #CBD5E0;
    margin-right: 16px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.cern-toolbar .toolbar-label {
    color: #CBD5E0;
    margin-right: 16px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.cern-toolbar .toolbar-links a:hover {
    color: var(--cern-white);
}

.cern-toolbar .toolbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cern-toolbar .toolbar-user span {
    font-weight: 600;
    color: var(--cern-white);
}

/* Header & Navigation */
.main-header {
    background-color: var(--cern-white);
    border-bottom: 1px solid var(--cern-border);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--cern-dark);
}

.logo-cern {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--cern-blue);
    border: 3px solid var(--cern-blue);
    padding: 2px 10px;
    border-radius: 4px;
    line-height: 1;
}

.logo-cern span {
    font-weight: 300;
    color: var(--cern-dark);
}

.site-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--cern-dark);
    border-left: 2px solid var(--cern-border);
    padding-left: 12px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    font-weight: 600;
    color: var(--cern-text-light);
    padding: 8px 0;
    border-bottom: 2px solid transparent;
}

.nav-link:hover, .nav-link.active {
    color: var(--cern-blue);
    border-bottom-color: var(--cern-blue);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--cern-darker) 0%, var(--cern-dark) 50%, var(--cern-blue) 100%);
    color: var(--cern-white);
    padding: 80px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: var(--cern-white);
    font-size: 44px;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.hero p {
    font-size: 18px;
    color: #E2E8F0;
    max-width: 600px;
    margin: 0 auto 32px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 4px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    text-align: center;
}

.btn-primary {
    background-color: var(--cern-blue);
    color: var(--cern-white);
}

.btn-primary:hover {
    background-color: var(--cern-blue-hover);
    color: var(--cern-white);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--cern-border);
    color: var(--cern-text-dark);
}

.btn-secondary:hover {
    background-color: var(--cern-bg);
    border-color: var(--cern-gray);
}

.btn-danger {
    background-color: var(--cern-danger);
    color: var(--cern-white);
}

.btn-danger:hover {
    background-color: #A52A2A;
}

.btn-success {
    background-color: var(--cern-success);
    color: var(--cern-white);
}

.btn-success:hover {
    background-color: #22643E;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
}

/* Content Container */
.main-container {
    max-width: 1200px;
    margin: 48px auto;
    padding: 0 24px;
}

/* Alert Boxes */
.alert {
    padding: 16px;
    border-radius: 4px;
    margin-bottom: 24px;
    border: 1px solid transparent;
    font-size: 14px;
}

.alert-success {
    background-color: var(--cern-success-light);
    border-color: #B2F5EA;
    color: var(--cern-success);
}

.alert-danger {
    background-color: var(--cern-danger-light);
    border-color: #FEB2B2;
    color: var(--cern-danger);
}

/* Grid & Cards */
.grid-events {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.card-event {
    background-color: var(--cern-white);
    border: 1px solid var(--cern-border);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}

.card-event:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-body {
    padding: 24px;
    flex-grow: 1;
}

.card-meta {
    font-size: 13px;
    color: var(--cern-gray);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-title {
    font-size: 20px;
    margin-bottom: 12px;
}

.card-description {
    color: var(--cern-text-light);
    font-size: 14px;
    margin-bottom: 20px;
}

.card-footer {
    padding: 16px 24px;
    background-color: var(--cern-bg);
    border-top: 1px solid var(--cern-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Forms Styling */
.form-card {
    background-color: var(--cern-white);
    border: 1px solid var(--cern-border);
    border-radius: 6px;
    box-shadow: var(--shadow-md);
    max-width: 500px;
    margin: 0 auto;
    padding: 40px;
}

.form-title {
    text-align: center;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    color: var(--cern-dark);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-body);
    font-size: 15px;
    border: 1px solid var(--cern-border);
    border-radius: 4px;
    background-color: var(--cern-white);
    color: var(--cern-text-dark);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    outline: none;
    border-color: var(--cern-blue);
    box-shadow: 0 0 0 3px rgba(0, 51, 160, 0.15);
}

.form-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 14px;
    color: var(--cern-text-light);
}

/* Layout Split Panels (for Dashboards) */
.dashboard-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 32px;
}

@media (max-width: 992px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }
}

.panel-sidebar {
    background-color: var(--cern-white);
    border: 1px solid var(--cern-border);
    border-radius: 6px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    height: fit-content;
    min-width: 0;
}

.sidebar-title {
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--cern-blue);
}

.user-badge {
    text-align: center;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--cern-border);
}

.user-avatar {
    width: 72px;
    height: 72px;
    background-color: var(--cern-blue-light);
    color: var(--cern-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 12px;
}

.user-name {
    font-size: 16px;
    font-weight: 700;
}

.user-role-badge {
    display: inline-block;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    background-color: var(--cern-blue-light);
    color: var(--cern-blue);
    border-radius: 12px;
    margin-top: 4px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 4px;
    font-weight: 600;
    color: var(--cern-text-light);
    transition: all 0.2s ease;
}

.sidebar-nav-link:hover, .sidebar-nav-link.active {
    background-color: var(--cern-bg);
    color: var(--cern-blue);
}

/* Dashboard Panels & Tables */
.panel-main {
    background-color: var(--cern-white);
    border: 1px solid var(--cern-border);
    border-radius: 6px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--cern-border);
}

/* Modern Tables styling */
.table-responsive {
    overflow-x: auto;
}

.table-cern {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table-cern th {
    background-color: var(--cern-bg);
    padding: 14px 16px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--cern-dark);
    border-bottom: 2px solid var(--cern-border);
}

.table-cern td {
    padding: 16px;
    border-bottom: 1px solid var(--cern-border);
    font-size: 14px;
    vertical-align: middle;
}

.table-cern tr:hover {
    background-color: rgba(247, 250, 252, 0.6);
}

.pill {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
}

.pill-success {
    background-color: var(--cern-success-light);
    color: var(--cern-success);
}

.pill-warning {
    background-color: var(--cern-warning-light);
    color: var(--cern-warning);
}

/* Footer Section */
.main-footer {
    background-color: var(--cern-darker);
    color: #A0AEC0;
    padding: 48px 24px;
    border-top: 4px solid var(--cern-blue);
    font-size: 14px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-logo .logo-cern {
    color: var(--cern-white);
    border-color: var(--cern-white);
    width: fit-content;
}

.footer-logo .logo-cern span {
    color: #A0AEC0;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: #A0AEC0;
}

.footer-links a:hover {
    color: var(--cern-white);
}

/* Modal styles for creating meetings in dashboard */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 15, 46, 0.7);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--cern-white);
    border-radius: 6px;
    width: 100%;
    max-width: 600px;
    box-shadow: var(--shadow-lg);
    animation: modalFadeIn 0.3s ease-out;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--cern-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    font-size: 24px;
    font-weight: 700;
    color: var(--cern-gray);
    cursor: pointer;
    background: none;
    border: none;
}

.modal-close:hover {
    color: var(--cern-dark);
}

.modal-body {
    padding: 24px;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 350px;
    width: 90%;
}

.toast-item {
    background-color: var(--cern-darker);
    color: var(--cern-white);
    padding: 16px 20px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--cern-blue);
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    word-wrap: break-word;
}

.toast-item.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success {
    border-left-color: var(--cern-success);
    background-color: #0c2014;
    color: #e6fffa;
}

.toast-danger {
    border-left-color: var(--cern-danger);
    background-color: #2d1212;
    color: #fff5f5;
}

.toast-info {
    border-left-color: var(--cern-blue);
    background-color: #09132c;
    color: #ebf8ff;
}

/* ==========================================================================
   Mobile Responsiveness Optimization Rules
   ========================================================================== */
@media (max-width: 992px) {
    .dashboard-layout {
        grid-template-columns: 1fr !important;
        gap: 20px;
    }
    .panel-main {
        padding: 20px;
    }
    .panel-sidebar {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 16px;
        padding: 16px;
        align-items: center;
    }
    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px 16px;
        width: 100%;
    }
    .logo-link {
        flex-direction: column;
        gap: 4px;
        align-items: center;
    }
    .site-title {
        border-left: none;
        padding-left: 0;
        font-size: 15px;
        text-align: center;
    }
    .hero {
        padding: 48px 16px;
    }
    .hero h1 {
        font-size: 32px;
    }
    .hero p {
        font-size: 15px;
    }
    .main-container {
        margin: 24px auto;
        padding: 0 16px;
    }
    .table-cern th, .table-cern td {
        padding: 12px 10px;
        font-size: 13px;
    }
    .grid-events {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 576px) {
    .cern-toolbar {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 8px 16px;
    }
    .cern-toolbar .toolbar-user {
        justify-content: center;
        width: 100%;
    }
    .form-card {
        padding: 24px 16px;
        border: none;
        box-shadow: none;
        background-color: transparent;
    }
    .modal-content {
        margin: 12px;
        max-width: calc(100% - 24px);
    }
    .modal-header, .modal-body {
        padding: 16px;
    }
    .footer-container {
        flex-direction: column;
        text-align: center;
        align-items: center;
        gap: 20px;
    }
    .footer-links {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
}