/* ========================================
   CSS Custom Properties (Variables)
   ======================================== */
:root {
    --primary: #00819c;
    --secondary: #5bc0de;
    --success: #34c759;
    --error: #ff3b30;
    --warning: #ff9500;
    --background: #f8f9fa;
    --text-primary: #000;
    --text-muted: #666;
    --text-light: #999;
    --border: #ddd;
    --border-focus: var(--secondary);
    --border-error: var(--error);
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 6px;
    --radius-large: 12px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --transition: all 0.2s ease;
}

/* ========================================
   Base Styles
   ======================================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--background);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@-moz-document url-prefix() {
    body {
        font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    }

    input[type="text"],
    input[type="email"] {
        font-family: inherit;
    }

    button,
    .button {
        font-family: inherit;
    }
}

* {
    font-family: inherit;
}

input[type="text"],
input[type="email"],
button,
.button {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   Container Layouts
   ======================================== */
.container {
    max-width: 600px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-large);
    box-shadow: var(--shadow);
    text-align: center;
}

.container h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: var(--spacing-md) 0;
    color: var(--primary);
}

.container p {
    font-size: 1.125rem;
    margin: var(--spacing-sm) 0;
    line-height: 1.5;
}

/* ========================================
   Form Elements
   ======================================== */
.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin: var(--spacing-sm) 0;
}

input[type="text"],
input[type="email"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
    box-sizing: border-box;
    background: white;
}

input[type="text"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

input[type="text"].input-error,
input[type="email"].input-error {
    border-color: var(--border-error);
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.1);
}

input[type="text"]:disabled,
input[type="email"]:disabled {
    background-color: #f5f5f5;
    color: var(--text-muted);
    cursor: not-allowed;
}

/* ========================================
   Buttons
   ======================================== */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    background: var(--secondary);
    color: white;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    min-height: 44px; /* Better accessibility */
    box-sizing: border-box;
}

.button:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
}

.button:active {
    transform: translateY(0);
}

.button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.button.button-error,
.button#delete {
    background-color: var(--error);
}

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

.button.button-secondary {
    background-color: white;
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

/* ========================================
   Status Messages
   ======================================== */
.status {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
    margin: 0;
    margin-top: var(--spacing-md);
    display: none;
    font-size: 0.95rem;
    line-height: 1.4;
}

.status.visible {
    display: block;
}

.status.success {
    background: #e6ffed;
    border: 1px solid #b3e6cb;
    color: #1e7e34;
}

.status.error {
    background: #ffeef0;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.status.warning {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

.status.persistent {
    cursor: pointer;
    position: relative;
}

.status.persistent::after {
    content: " (click to dismiss)";
    opacity: 0.7;
    font-size: 0.85em;
    font-style: italic;
}

/* ========================================
   Error Messages
   ======================================== */
.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
    text-align: left;
}

.error-message.visible {
    display: block;
}

/* ========================================
   Special Elements
   ======================================== */
.confirmation-icon {
    font-size: 4rem;
    margin: var(--spacing-sm) 0;
    display: inline-block;
}

.success-icon {
    color: var(--success);
}

.info-icon {
    color: var(--secondary);
}

.email-address,
.email-display {
    font-weight: 500;
    padding: 12px 20px;
    background: rgba(44, 62, 80, 0.05);
    border-radius: var(--radius);
    display: inline-block;
    margin: var(--spacing-sm) 0;
    font-size: 1.1rem;
    border: 1px solid rgba(44, 62, 80, 0.1);
}

/* ========================================
   Emoji Support
   ======================================== */
img.emoji {
    width: 1em;
    height: 1em;
    vertical-align: -0.1em;
    display: inline-block;
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus indicators for keyboard navigation */
.button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
}