/*
 * Modern theme for the EPS application
 *
 * This stylesheet defines a set of CSS variables and component styles
 * designed to give the application a vibrant, futuristic look. It
 * relies on Bootstrap 5 classes for layout but overrides the default
 * colours and typography. Components such as the navigation bar,
 * cards, buttons and forms have been enhanced to feel more modern
 * and polished. The primary and secondary colours can be easily
 * adjusted by changing the CSS variables below.
 */

/* Colour palette and general variables */
:root {
    --primary: #00bcd4;        /* Vibrant cyan */
    --secondary: #673ab7;      /* Deep purple */
    --accent: #ff4081;         /* Pink accent for highlights */
    --background: #f7f9fc;     /* Soft grey/blue background */
    --surface: #ffffff;        /* Card surface colour */
    --border: #e6eaf0;         /* Light border */
    --text: #2e3a59;           /* Dark blue-grey text */
}

/* Global styles */
body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Modern navigation bar with gradient */
.modern-navbar {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.modern-navbar .navbar-brand {
    font-weight: 600;
    color: #ffffff !important;
}
.modern-navbar .nav-link {
    color: #ffffff !important;
    transition: color 0.2s;
}
.modern-navbar .nav-link:hover,
.modern-navbar .nav-link:focus {
    color: rgba(255, 255, 255, 0.85) !important;
}

/* Cards for lists and detail views */
.card-modern {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.3s ease;
}
.card-modern:hover {
    transform: translateY(-4px);
}
.card-modern .card-header {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: #fff;
    font-weight: 600;
}
.card-modern .card-body {
    padding: 1.5rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transition: background-color 0.2s, border-color 0.2s;
}
.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--secondary);
    border-color: var(--secondary);
}
.btn-secondary {
    background-color: var(--secondary);
    border-color: var(--secondary);
    color: #fff;
}
.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--primary);
    border-color: var(--primary);
}
.btn-accent {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.btn-accent:hover,
.btn-accent:focus {
    background-color: var(--secondary);
    border-color: var(--secondary);
}

/* Form styling */
.form-modern {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.form-modern label {
    font-weight: 500;
    margin-top: 1rem;
}
.form-modern input[type="text"],
.form-modern input[type="email"],
.form-modern input[type="password"],
.form-modern input[type="date"],
.form-modern input[type="file"],
.form-modern textarea,
.form-modern select {
    width: 100%;
    padding: 0.6rem 0.75rem;
    margin-top: 0.25rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    background-color: var(--background);
    color: var(--text);
}
.form-modern textarea {
    min-height: 120px;
}
.form-modern button {
    margin-top: 1.5rem;
}

/* DataTable customisations */
.table-modern thead th {
    background-color: var(--primary);
    color: #fff;
    border: none;
}
.table-modern tbody tr:nth-of-type(odd) {
    background-color: var(--background);
}
.table-modern tbody tr:nth-of-type(even) {
    background-color: var(--surface);
}
.table-modern tbody td {
    border: none;
    color: var(--text);
    vertical-align: middle;
}

/* Cycle section highlighting */
.cycle-section {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: var(--background);
    border-left: 6px solid var(--primary);
    border-radius: 0.5rem;
}
.cycle-section h4 {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

/* Messages (alerts) */
.message {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}
.message.error {
    background-color: #f8d7da;
    color: #842029;
    border-left: 4px solid #f5c2c7;
}
.message.success {
    background-color: #d1e7dd;
    color: #0f5132;
    border-left: 4px solid #badbcc;
}

/* Footer styling */
footer {
    background: linear-gradient(45deg, var(--secondary), var(--primary));
    color: #fff;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
    font-size: 0.875rem;
    box-shadow: 0 -4px 8px rgba(0,0,0,0.05);
}

/* Utilities */
.text-accent {
    color: var(--accent);
}
.bg-surface {
    background-color: var(--surface);
}
.rounded-large {
    border-radius: 1rem;
}