/* CSS Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* ===== PRIMARY (Yellow) ===== */
    --primary-color: #F6F050;           /* Accent Yellow - main CTA, highlights */
    --primary-hover: #E5E048;           /* Slightly darker yellow for hover */
    --primary-active: #D4D040;          /* Even darker for pressed state */
    --primary-bg-light: #FBF7A7;        /* Faded Yellow - subtle backgrounds */
    --primary-bg-lighter: #FDFCE8;      /* Ultra-light yellow tint */

    /* ===== SECONDARY (Navy) ===== */
    --secondary-color: #020535;         /* Primary Navy - text, headers, contrast */
    --secondary-hover: #0A0D45;         /* Lighter navy for hover */
    --secondary-light: #81829A;         /* Faded Navy - subtle text, icons */

    /* ===== SEMANTIC COLORS ===== */
    --success-color: #19B044;           /* Accent Green */
    --success-light: #8CD7A1;           /* Faded Green */
    --danger-color: #FB4045;            /* Accent Red */
    --danger-light: #FD9FA2;            /* Faded Red */
    --warning-color: #F6F050;           /* Same as primary (yellow) */
    --warning-light: #FBF7A7;           /* Faded Yellow */
    --info-color: #435EEA;              /* Accent Blue */
    --info-light: #A1AFF4;              /* Faded Blue */

    /* ===== TEXT ===== */
    --text-primary: #111111;            /* Dark Black - main body text */
    --text-secondary: #606060;          /* Dark Gray - secondary text */
    --text-muted: #81829A;              /* Faded Navy - muted, hints */
    --text-on-primary: #020535;         /* Navy on yellow backgrounds */
    --text-on-dark: #FFFFFF;            /* White text on dark backgrounds */

    /* ===== BACKGROUNDS ===== */
    --bg-primary: #FFFFFF;              /* White - cards, main content */
    --bg-secondary: #DCDCDC;            /* Light Gray - page background */
    --bg-tertiary: #ACACAC;             /* Mid Gray - sections, dividers */
    --bg-dark: #606060;                 /* Dark Gray - dark sections, footers */

    /* ===== BORDERS ===== */
    --border-color: #DCDCDC;            /* Light Gray */
    --border-color-light: #E5E5E5;      /* Slightly lighter */
    --border-color-hover: #F6F050;      /* Yellow on hover */
    --border-color-dark: #ACACAC;       /* Mid Gray for emphasis */

    /* ===== EFFECTS ===== */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --focus-ring: rgba(246, 240, 80, 0.4);  /* Yellow glow */

    /* ===== LAYOUT ===== */
    --max-width: 1200px;
    --spacing: 1rem;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 0;
}

/* Navbar */
.navbar {
    background-color: var(--secondary-color);
    border-bottom: none;
    padding: 1rem 0;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
}

.navbar-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.navbar-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.navbar-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.navbar-link:hover {
    color: var(--primary-color);
}

.navbar-link-button {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.2s;
}

.navbar-link-button:hover {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    border-top: none;
    padding: 2rem 0;
    margin-top: auto;
    text-align: center;
    color: var(--text-on-dark);
    font-size: 0.875rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Flash Messages */
.flash {
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    border-left: 4px solid;
}

.flash-success {
    background-color: var(--success-light);
    border-color: var(--success-color);
    color: #065f46;
}

.flash-error {
    background-color: var(--danger-light);
    border-color: var(--danger-color);
    color: #7f1d1d;
}

.flash-info {
    background-color: var(--info-light);
    border-color: var(--info-color);
    color: #1e3a8a;
}

.flash-warning {
    background-color: var(--warning-light);
    border-color: var(--warning-color);
    color: #713f12;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.5;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-on-primary);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-primary:active {
    background-color: var(--primary-active);
    border-color: var(--primary-active);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-on-dark);
    border: 2px solid var(--secondary-color);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-outline:hover {
    background-color: var(--secondary-color);
    color: var(--text-on-dark);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: 2px solid var(--danger-color);
}

.btn-danger:hover {
    background-color: #E03035;
    border-color: #E03035;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.button-group {
    display: flex;
    gap: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.form-help {
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Cards */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-transform: uppercase;
}

.badge-active {
    background-color: var(--success-light);
    color: #065f46;
}

.badge-expired {
    background-color: var(--warning-light);
    color: #713f12;
}

.badge-revoked {
    background-color: var(--danger-light);
    color: #7f1d1d;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-menu {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .button-group {
        flex-direction: column;
    }

    .btn-block-mobile {
        display: block;
        width: 100%;
    }
}