/* Conference Paper Submission System - Custom Styles */

:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f8f9fa;
}

main {
    flex: 1;
}

/* Card Styling */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: box-shadow 0.15s ease-in-out;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Auth Card */
.auth-card {
    max-width: 450px;
    margin: 2rem auto;
}

.auth-card .card-header {
    background: linear-gradient(135deg, var(--primary-color), #0056b3);
    color: white;
    text-align: center;
    padding: 1.5rem;
}

.auth-card .card-header h4 {
    margin: 0;
}

/* Dashboard Stats */
.stat-card {
    text-align: center;
    padding: 1.5rem;
}

.stat-card .stat-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.stat-card .stat-number {
    font-size: 2.5rem;
    font-weight: bold;
}

.stat-card .stat-label {
    color: rgba(255, 255, 255, 0.9);
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Custom Primary Button Styling */
.btn-primary,
.btn-success,
.btn-secondary,
.btn-info,
.btn-danger {
    background-color: #A62B1D !important;
    border-color: #A62B1D !important;
    color: white !important;
    transition: all 0.3s ease;
}

.btn-primary:hover,
.btn-success:hover,
.btn-secondary:hover,
.btn-info:hover,
.btn-danger:hover {
    background-color: #8a2318 !important;
    border-color: #8a2318 !important;
    box-shadow: 0 8px 20px rgba(166, 43, 29, 0.4);
    transform: translateY(-2px);
}

.btn-primary:active,
.btn-success:active,
.btn-secondary:active,
.btn-info:active,
.btn-danger:active {
    background-color: #701d14 !important;
    border-color: #701d14 !important;
    box-shadow: 0 4px 10px rgba(166, 43, 29, 0.3);
}

/* Outline Buttons */
.btn-outline-primary,
.btn-outline-success,
.btn-outline-secondary,
.btn-outline-info,
.btn-outline-danger {
    color: #A62B1D !important;
    border-color: #A62B1D !important;
    background-color: transparent !important;
}

.btn-outline-primary:hover,
.btn-outline-success:hover,
.btn-outline-secondary:hover,
.btn-outline-info:hover,
.btn-outline-danger:hover {
    background-color: #A62B1D !important;
    border-color: #A62B1D !important;
    color: white !important;
    box-shadow: 0 8px 20px rgba(166, 43, 29, 0.4);
}

/* Navbar styling */
.navbar.bg-danger,
.navbar.bg-primary,
.navbar.bg-secondary {
    background-color: #A62B1D !important;
}

/* Stat Card Background - Complementary Colors */
.stat-card.bg-primary {
    background-color: #2C3E50 !important;
    /* Dark Slate */
    color: white !important;
}

.stat-card.bg-success {
    background-color: #1ABC9C !important;
    /* Teal */
    color: white !important;
}

.stat-card.bg-secondary {
    background-color: #34495E !important;
    /* Charcoal */
    color: white !important;
}

.stat-card.bg-info {
    background-color: #3498DB !important;
    /* Steel Blue */
    color: white !important;
}

.stat-card.bg-warning {
    background-color: #D68910 !important;
    /* Amber/Gold */
    color: white !important;
}

.stat-card.bg-danger {
    background-color: #A62B1D !important;
    /* Theme Red */
    color: white !important;
}

.stat-card.text-dark {
    color: white !important;
}

/* Footer Styling - Match Header */
footer.bg-dark {
    background-color: #A62B1D !important;
}

/* Status Badges */
.status-submitted {
    background-color: var(--info-color);
    color: white;
}

.status-under-review {
    background-color: var(--warning-color);
    color: black;
}

.status-accepted {
    background-color: var(--success-color);
    color: white;
}

.status-rejected {
    background-color: var(--danger-color);
    color: white;
}

/* File Upload */
.file-upload-wrapper {
    position: relative;
    margin-bottom: 1rem;
}

.file-upload-wrapper input[type="file"] {
    padding: 0.75rem;
    border: 2px dashed #dee2e6;
    border-radius: 0.375rem;
    background-color: #fff;
    cursor: pointer;
    transition: border-color 0.15s ease-in-out;
}

.file-upload-wrapper input[type="file"]:hover {
    border-color: var(--primary-color);
}

/* OTP Input */
.otp-input {
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    font-weight: bold;
}

/* Table Styling */
.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

/* Alert Styling */
.alert {
    border: none;
    border-radius: 0.5rem;
}

/* Navbar */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
}

/* Footer */
footer {
    margin-top: auto;
}

/* Form Labels */
.form-label {
    font-weight: 500;
}

/* Required Asterisk */
.required::after {
    content: " *";
    color: var(--danger-color);
}

/* Page Header */
.page-header {
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--secondary-color);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}