/**
 * LOGIN PAGE STYLES
 * Brand-aligned, responsive login form
 * Aligned with AI_INFOPOINT/16_BRAND_IDENTITY.md and 17_UI_ADAPTABILITY_AND_RESPONSIVNESS.md
 *
 * Version: 1.0.0
 * Date: February 5, 2026
 */

/* ============================================
   BASE & LAYOUT
   ============================================ */

/* Skip link: visible on focus for keyboard users */
.skip-link {
    position: absolute;
    top: -3rem;
    left: 1rem;
    padding: 0.5rem 1rem;
    background: var(--brand-petrolium);
    color: var(--brand-white);
    z-index: 100;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 1rem;
    outline: 2px solid var(--brand-white);
}

.login-page {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.login-page *,
.login-page *::before,
.login-page *::after {
    box-sizing: border-box;
}

body.login-page {
    font-family: var(--font-body);
    background: var(--gradient-petrolium);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    margin: 0;
}

/* ============================================
   CARD CONTAINER
   ============================================ */

.login-container {
    background: var(--brand-white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 1.25rem 3.75rem rgba(0, 0, 0, 0.25), 0 0.25rem 0.75rem rgba(14, 67, 71, 0.15);
    width: 100%;
    max-width: 26.25rem;
    animation: loginSlideUp 0.4s ease;
}

@keyframes loginSlideUp {
    from {
        opacity: 0;
        transform: translateY(1.875rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   LOGO SECTION
   Brand: Center-aligned, large and predominant
   White card = main dark logo (logo_040group.svg)
   ============================================ */

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
    line-height: 0;
}

.login-logo .logo-link.login-logo-link {
    display: block;
    line-height: 0;
}

/* Extends .logo-link from brand.css - logo predominant, way bigger */
.login-logo .logo-link.login-logo-link img {
    height: clamp(2.8rem, 7.7vw, 4.9rem);
    width: auto;
    max-width: 100%;
    object-fit: contain;
    display: block;
    margin: 0 auto;
}

/* ============================================
   FORM ELEMENTS
   Spacing rhythm: 0.5rem, 1rem, 1.5rem, 2rem
   Touch targets: min 44px
   ============================================ */

.login-form {
    margin: 0;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-family: var(--font-heading);
    font-weight: var(--font-weight-medium);
    color: var(--brand-black);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 0.5rem;
    font-size: var(--font-size-base);
    font-family: var(--font-body);
    color: var(--brand-black);
    background: var(--brand-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--brand-petrolium);
    box-shadow: 0 0 0 3px rgba(14, 67, 71, 0.12);
}

.login-form input::placeholder {
    color: var(--color-text-muted);
}

/* Password field with show/hide toggle */
.login-password-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.login-password-wrap input {
    padding-right: 2.75rem;
}

.login-toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    min-width: 2.25rem;
    min-height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.25rem;
    transition: color 0.2s, background-color 0.2s;
}

.login-toggle-password:hover {
    color: var(--brand-petrolium);
    background-color: rgba(14, 67, 71, 0.08);
}

.login-toggle-password:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--brand-petrolium);
}

.login-toggle-password[aria-pressed="true"] .fa-eye { display: none; }
.login-toggle-password[aria-pressed="true"] .fa-eye-slash { display: inline; }
.login-toggle-password:not([aria-pressed="true"]) .fa-eye { display: inline; }
.login-toggle-password:not([aria-pressed="true"]) .fa-eye-slash { display: none; }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Checkbox: touch target ≥44px */
.login-checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    min-height: 2.75rem;
}

.login-checkbox-group input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    min-width: 1.25rem;
    min-height: 1.25rem;
    margin: 0;
    cursor: pointer;
    accent-color: var(--brand-petrolium);
}

.login-checkbox-group label {
    font-size: var(--font-size-sm);
    font-family: var(--font-body);
    color: var(--color-text-light);
    cursor: pointer;
    user-select: none;
    margin: 0;
}

/* ============================================
   BUTTON
   Extends .btn-brand-primary from brand.css
   Adds layout, touch target ≥44px, login-specific effects
   ============================================ */

.login-btn-submit {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.875rem 1rem;
    border-radius: 0.5rem;
    font-size: var(--font-size-base);
    font-family: var(--font-heading);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.login-btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1.25rem rgba(14, 67, 71, 0.35);
}

.login-btn-submit:active {
    transform: translateY(0);
}

.login-btn-submit:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(14, 67, 71, 0.25);
}

.login-btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-btn-submit:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Loading state on submit */
.login-btn-submit.is-loading {
    position: relative;
}
.login-btn-loading::before {
    content: '';
    display: inline-block;
    width: 1em;
    height: 1em;
    margin-right: 0.5em;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: loginSpinner 0.8s linear infinite;
}
@keyframes loginSpinner {
    to { transform: rotate(360deg); }
}

/* ============================================
   ERROR MESSAGE
   ============================================ */

.login-error {
    background: var(--color-error-light);
    color: var(--color-error-text);
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: var(--font-size-sm);
    font-family: var(--font-body);
    border-left: 4px solid var(--color-error);
    animation: loginShake 0.4s ease;
}

@keyframes loginShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-0.5rem); }
    75% { transform: translateX(0.5rem); }
}

/* ============================================
   FORGOT PASSWORD LINK
   ============================================ */

.login-forgot-wrap {
    text-align: center;
    margin-top: 1rem;
}

/* .text-brand-petrolium from brand.css for base color */
.login-forgot-link {
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: color 0.2s, opacity 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.login-forgot-link:hover {
    color: var(--color-accent-light);
}

.login-forgot-link:focus {
    outline: none;
    text-decoration: underline;
}

/* ============================================
   FOOTER
   ============================================ */

/* .text-muted from brand.css for color */
.login-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: var(--font-size-xs);
    font-family: var(--font-body);
    line-height: var(--line-height-normal);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   Mobile (≤360px), Mobile (≤480px), Tablet (≤680px)
   ============================================ */

@media (max-width: 480px) {
    body.login-page {
        padding: 0.75rem;
        /* Allow scroll to reveal Accedi button when virtual keyboard is open (Subplan 09) */
        padding-bottom: 50vh;
    }

    .login-container {
        padding: 1.5rem 1.25rem;
    }

    .login-logo {
        margin-bottom: 1.5rem;
    }

    .login-logo .logo-link.login-logo-link img {
        height: clamp(2.1rem, 6.3vw, 3.5rem);
    }

    /* Larger input font for mobile legibility (web.dev: ~20px) */
    .login-form input[type="text"],
    .login-form input[type="password"] {
        font-size: 1.25rem;
    }

    .login-btn-submit {
        font-size: 1.125rem;
    }
}

@media (max-width: 360px) {
    body.login-page {
        padding: 0.5rem;
    }

    .login-container {
        padding: 1.25rem 1rem;
    }

    .login-logo {
        margin-bottom: 1.25rem;
    }

    .login-logo .logo-link.login-logo-link img {
        height: clamp(1.75rem, 7vw, 2.45rem);
    }
}

/* ============================================
   REDUCED MOTION
   WCAG 2.1: Respect user preference
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .login-container {
        animation: none;
    }

    .login-error {
        animation: none;
    }

    .login-btn-submit:hover {
        transform: none;
        box-shadow: 0 0.25rem 0.5rem rgba(14, 67, 71, 0.2);
    }

    .login-form input,
    .login-toggle-password {
        transition: none;
    }

    .login-btn-loading::before {
        animation: none;
    }
}