/**
 * Collekton Login Page Styles
 * 
 * Shared CSS for id.collekton.com login, register, forgot-password,
 * and 2FA pages. Matches the collekton.com design language.
 * 
 * Host at: cdn.collekton.com/css/collekton-login.css
 * Usage:   <link rel="stylesheet" href="https://cdn.collekton.com/css/collekton-login.css">
 * 
 * @version 1.0.0
 */

/* ========================================
   CSS Variables (Collekton Design System)
   ======================================== */

:root {
    --cl-font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
    --cl-font-size-xs: 0.65rem;
    --cl-font-size-sm: 0.75rem;
    --cl-font-size-base: 0.85rem;
    --cl-font-size-md: 1rem;
    --cl-font-size-lg: 1.25rem;

    --cl-color-text: #1a1a1a;
    --cl-color-text-muted: #666;
    --cl-color-text-subtle: #999;
    --cl-color-bg: #ffffff;
    --cl-color-bg-page: #fafafa;
    --cl-color-border: #e5e5e5;
    --cl-color-border-focus: #1a1a1a;
    --cl-color-btn: #1a1a1a;
    --cl-color-btn-hover: #333;
    --cl-color-btn-text: #ffffff;
    --cl-color-link: #1a1a1a;
    --cl-color-link-hover: #666;

    --cl-color-error-bg: #fef2f2;
    --cl-color-error-border: #fecaca;
    --cl-color-error-text: #991b1b;
    --cl-color-success-bg: #f0fdf4;
    --cl-color-success-border: #bbf7d0;
    --cl-color-success-text: #15803d;
    --cl-color-info-bg: #f8f8f8;
    --cl-color-info-border: #e5e5e5;
    --cl-color-info-text: #666;

    --cl-radius: 0;
    --cl-spacing-xs: 0.5rem;
    --cl-spacing-sm: 0.75rem;
    --cl-spacing-md: 1rem;
    --cl-spacing-lg: 1.5rem;
    --cl-spacing-xl: 2rem;
    --cl-spacing-2xl: 3rem;

    --cl-letter-spacing-label: 0.1em;
    --cl-letter-spacing-button: 0.12em;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
    font-size: 14px;
}

body {
    font-family: var(--cl-font-family);
    background: var(--cl-color-bg-page);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cl-color-text);
    padding: 20px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Container (login, register, forgot-pw)
   ======================================== */

.login-container,
.register-container,
.container {
    background: var(--cl-color-bg);
    border: 1px solid var(--cl-color-border);
    border-radius: var(--cl-radius);
    padding: var(--cl-spacing-2xl) var(--cl-spacing-xl);
    width: 100%;
    max-width: 500px;
}

/* ========================================
   Logo / Branding
   ======================================== */

.logo {
    text-align: center;
    margin-bottom: var(--cl-spacing-xl);
}

.logo h1 {
    font-size: var(--cl-font-size-lg);
    font-weight: 600;
    color: var(--cl-color-text);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: none;
    -webkit-background-clip: unset;
    -webkit-text-fill-color: unset;
    background-clip: unset;
}

.logo .subtitle {
    font-size: var(--cl-font-size-sm);
    color: var(--cl-color-text-subtle);
    margin-top: var(--cl-spacing-xs);
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-label);
}

/* ========================================
   Form Elements
   ======================================== */

.form-group {
    margin-bottom: var(--cl-spacing-lg);
}

.form-row {
    display: flex;
    gap: var(--cl-spacing-md);
}

.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    font-size: var(--cl-font-size-sm);
    font-weight: 500;
    color: var(--cl-color-text-muted);
    margin-bottom: var(--cl-spacing-xs);
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-label);
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="number"] {
    width: 100%;
    padding: var(--cl-spacing-sm);
    background: var(--cl-color-bg);
    border: 1px solid var(--cl-color-border);
    border-radius: var(--cl-radius);
    color: var(--cl-color-text);
    font-size: var(--cl-font-size-base);
    font-family: var(--cl-font-family);
    transition: border-color 0.2s ease;
}

input[type="email"]:focus,
input[type="password"]:focus,
input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--cl-color-border-focus);
}

input::placeholder {
    color: var(--cl-color-text-subtle);
}

/* ========================================
   Checkbox (Remember Me)
   ======================================== */

.remember-row {
    display: flex;
    align-items: center;
    margin-bottom: var(--cl-spacing-lg);
    gap: var(--cl-spacing-xs);
}

.remember-row input[type="checkbox"] {
    width: auto;
    accent-color: var(--cl-color-text);
}

.remember-row label {
    font-size: var(--cl-font-size-xs);
    color: var(--cl-color-text-subtle);
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: normal;
}

/* ========================================
   Buttons
   ======================================== */

button[type="submit"],
button.btn-primary,
.btn-primary {
    width: 100%;
    padding: var(--cl-spacing-sm) var(--cl-spacing-lg);
    background: var(--cl-color-btn);
    border: 1px solid var(--cl-color-btn);
    border-radius: var(--cl-radius);
    color: var(--cl-color-btn-text);
    font-size: var(--cl-font-size-sm);
    font-weight: 500;
    font-family: var(--cl-font-family);
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-button);
    cursor: pointer;
    transition: background 0.2s ease;
    margin-top: var(--cl-spacing-xs);
}

button[type="submit"]:hover,
button.btn-primary:hover,
.btn-primary:hover {
    background: var(--cl-color-btn-hover);
    border-color: var(--cl-color-btn-hover);
    transform: none;
    box-shadow: none;
}

button[type="submit"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   Links (Forgot Password, Create Account)
   ======================================== */

.links {
    text-align: center;
    margin-top: var(--cl-spacing-xl);
    padding-top: var(--cl-spacing-lg);
    border-top: 1px solid var(--cl-color-border);
}

.links a {
    color: var(--cl-color-text-muted);
    text-decoration: none;
    font-size: var(--cl-font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-label);
}

.links a:hover {
    color: var(--cl-color-text);
    text-decoration: none;
}

.links .separator {
    color: var(--cl-color-text-subtle);
    margin: 0 var(--cl-spacing-sm);
}

.login-link,
.back-link {
    display: block;
    text-align: center;
    margin-top: var(--cl-spacing-xl);
    padding-top: var(--cl-spacing-lg);
    border-top: 1px solid var(--cl-color-border);
    font-size: var(--cl-font-size-xs);
    color: var(--cl-color-text-subtle);
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-label);
    text-decoration: none;
}

.login-link a,
.back-link {
    color: var(--cl-color-text-muted);
    text-decoration: none;
}

.login-link a:hover,
.back-link:hover {
    color: var(--cl-color-text);
}

/* ========================================
   Alert Messages
   ======================================== */

.error-message,
.error {
    background: var(--cl-color-error-bg);
    border: 1px solid var(--cl-color-error-border);
    color: var(--cl-color-error-text);
    padding: var(--cl-spacing-sm) var(--cl-spacing-md);
    border-radius: var(--cl-radius);
    font-size: var(--cl-font-size-sm);
    margin-bottom: var(--cl-spacing-lg);
    line-height: 1.5;
}

.success-message,
.success {
    background: var(--cl-color-success-bg);
    border: 1px solid var(--cl-color-success-border);
    color: var(--cl-color-success-text);
    padding: var(--cl-spacing-sm) var(--cl-spacing-md);
    border-radius: var(--cl-radius);
    font-size: var(--cl-font-size-sm);
    margin-bottom: var(--cl-spacing-lg);
    line-height: 1.5;
}

.info-message,
.info,
.info-note {
    background: var(--cl-color-info-bg);
    border: 1px solid var(--cl-color-info-border);
    color: var(--cl-color-info-text);
    padding: var(--cl-spacing-sm) var(--cl-spacing-md);
    border-radius: var(--cl-radius);
    font-size: var(--cl-font-size-sm);
    margin-bottom: var(--cl-spacing-lg);
    line-height: 1.5;
}

/* ========================================
   Page Headings & Status
   ======================================== */

.page-heading {
    text-align: center;
    margin-bottom: var(--cl-spacing-lg);
}

.page-heading h2 {
    font-size: var(--cl-font-size-md);
    font-weight: 600;
    color: var(--cl-color-text);
    margin-bottom: var(--cl-spacing-xs);
}

.page-heading p {
    font-size: var(--cl-font-size-sm);
    color: var(--cl-color-text-muted);
}

.user-email {
    text-align: center;
    font-size: var(--cl-font-size-sm);
    color: var(--cl-color-text-muted);
    margin-bottom: var(--cl-spacing-lg);
}

.user-email strong {
    color: var(--cl-color-text);
}

/* ========================================
   Steps / Instructions
   ======================================== */

.steps {
    font-size: var(--cl-font-size-sm);
    color: var(--cl-color-text-muted);
    margin-bottom: var(--cl-spacing-lg);
}

.steps ol {
    padding-left: 20px;
}

.steps li {
    margin-bottom: var(--cl-spacing-xs);
}

/* ========================================
   Block Action Link (button-style link)
   ======================================== */

a.btn-primary {
    display: block;
    text-align: center;
    text-decoration: none;
}

/* ========================================
   Manual Key (wider block for secret display)
   ======================================== */

.manual-key-block {
    background: var(--cl-color-bg-page);
    border: 1px solid var(--cl-color-border);
    padding: var(--cl-spacing-md);
    margin-bottom: var(--cl-spacing-lg);
    text-align: center;
}

.manual-key-block label {
    margin-bottom: var(--cl-spacing-xs);
}

.manual-key-block code {
    font-family: monospace;
    font-size: var(--cl-font-size-sm);
    word-break: break-all;
}

/* ========================================
   Backup Codes Grid
   ======================================== */

.backup-codes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--cl-spacing-xs);
}

.backup-code {
    background: var(--cl-color-bg-page);
    border: 1px solid var(--cl-color-border);
    padding: var(--cl-spacing-xs);
    font-family: monospace;
    font-size: var(--cl-font-size-sm);
    text-align: center;
}

/* ========================================
   Password Hint
   ======================================== */

.field-hint {
    font-size: var(--cl-font-size-xs);
    color: var(--cl-color-text-subtle);
    margin-top: var(--cl-spacing-xs);
}

/* ========================================
   2FA / TOTP
   ======================================== */

.twofa-container,
.mfa-container {
    text-align: center;
}

.twofa-code-input,
input.twofa-code-input {
    text-align: center;
    font-size: var(--cl-font-size-lg);
    letter-spacing: 0.5em;
    padding: var(--cl-spacing-sm);
    font-family: monospace;
}

.twofa-hint,
.mfa-hint {
    font-size: var(--cl-font-size-xs);
    color: var(--cl-color-text-subtle);
    margin-top: var(--cl-spacing-xs);
}

.qr-code {
    margin: var(--cl-spacing-lg) auto;
    text-align: center;
}

.qr-code img {
    max-width: 200px;
    height: auto;
}

.manual-key {
    font-family: monospace;
    font-size: var(--cl-font-size-sm);
    background: var(--cl-color-bg-page);
    padding: var(--cl-spacing-xs) var(--cl-spacing-sm);
    border: 1px solid var(--cl-color-border);
    display: inline-block;
    word-break: break-all;
}

.backup-codes {
    font-family: monospace;
    font-size: var(--cl-font-size-sm);
    background: var(--cl-color-bg-page);
    padding: var(--cl-spacing-md);
    border: 1px solid var(--cl-color-border);
    margin: var(--cl-spacing-md) 0;
    line-height: 2;
}

/* ========================================
   App Chooser (post-login app selector)
   ======================================== */

.app-list {
    display: flex;
    flex-direction: column;
    gap: var(--cl-spacing-sm);
}

.app-button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--cl-spacing-md) var(--cl-spacing-md);
    background: var(--cl-color-bg);
    border: 1px solid var(--cl-color-border);
    border-radius: var(--cl-radius);
    text-decoration: none;
    color: var(--cl-color-text);
    transition: border-color 0.2s ease;
}

.app-button:hover {
    border-color: var(--cl-color-border-focus);
}

.app-button--target {
    border-color: var(--cl-color-text);
    background: var(--cl-color-bg-page);
}

.app-button-content {
    flex: 1;
}

.app-name {
    font-size: var(--cl-font-size-base);
    font-weight: 600;
    color: var(--cl-color-text);
    margin-bottom: 2px;
}

.app-host {
    font-size: var(--cl-font-size-xs);
    color: var(--cl-color-text-subtle);
}

.app-role {
    font-size: var(--cl-font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: var(--cl-letter-spacing-label);
    color: var(--cl-color-text-muted);
    margin-top: 2px;
}

.app-countdown {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cl-color-text);
    min-width: 40px;
    text-align: center;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
    html {
        font-size: 12px;
    }

    body {
        padding: 16px;
        align-items: flex-start;
        padding-top: 10vh;
    }

    .login-container,
    .register-container,
    .container {
        padding: var(--cl-spacing-xl) var(--cl-spacing-lg);
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

@media (max-width: 480px) {
    .login-container,
    .register-container,
    .container {
        padding: var(--cl-spacing-lg) var(--cl-spacing-md);
        border-left: none;
        border-right: none;
    }
}