/* Lucerna Platform Styles */
:root {
    --color-primary: #4A90E2;
    --color-primary-dark: #2E5C8A;
    --color-success: #5CB85C;
    --color-warning: #F0AD4E;
    --color-danger: #D9534F;
    --color-bg: #F5F7FA;
    --color-surface: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E0E0E0;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.container-sm {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    margin-bottom: 20px;
}

.card-header {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--color-text);
}

/* Center screen layout */
.center-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-input.error {
    border-color: var(--color-danger);
}

.form-error {
    color: var(--color-danger);
    font-size: 14px;
    margin-top: 6px;
}

.form-help {
    color: var(--color-text-light);
    font-size: 14px;
    margin-top: 6px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
}

.btn-secondary {
    background: #6C757D;
    color: white;
}

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

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

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

/* PIN Pad */
.pin-display {
    text-align: center;
    margin: 30px 0;
}

.pin-dots {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.pin-dot {
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-border);
    border-radius: 50%;
    transition: all 0.2s;
}

.pin-dot.filled {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.pin-keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-width: 300px;
    margin: 0 auto;
}

.pin-key {
    aspect-ratio: 1;
    font-size: 28px;
    font-weight: 600;
    border: 2px solid var(--color-border);
    background: white;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.pin-key:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
}

.pin-key:active {
    transform: scale(0.95);
}

.pin-key.clear {
    grid-column: 1 / -1;
    background: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
    font-size: 18px;
}

/* Alert messages */
.alert {
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.alert-success {
    background: #D4EDDA;
    color: #155724;
    border: 1px solid #C3E6CB;
}

.alert-error {
    background: #F8D7DA;
    color: #721C24;
    border: 1px solid #F5C6CB;
}

.alert-info {
    background: #D1ECF1;
    color: #0C5460;
    border: 1px solid #BEE5EB;
}

/* Links */
.link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-light);
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}