/* ===================================
   Auth Pages - Modern Minimal Design
   Design Philosophy: Clean, Simple, Focused
   =================================== */

:root {
    --main-color: #5cc0eb;
    --accent-purple: #B392F0;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --white: #ffffff;
    --background: #fafbfc;
    --border-color: #e5e7eb;
    --border-focus: var(--main-color);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: 62.5%; /* 1rem = 10px */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
    font-size: 1.5rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* ===================================
   Page Layout
   =================================== */

.auth-page {
    width: 100%;
    max-width: 44rem;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Back Link
   =================================== */

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 3.2rem;
    transition: all 0.2s ease;
}

.back-link:hover {
    color: var(--main-color);
    transform: translateX(-4px);
}

.back-link i {
    font-size: 1.2rem;
}

/* ===================================
   Auth Container
   =================================== */

.auth-container {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 1.2rem;
    padding: 4rem 3.2rem;
    box-shadow: var(--shadow-md);
}

/* ===================================
   Brand Section
   =================================== */

.auth-brand {
    text-align: center;
    margin-bottom: 3.2rem;
}

.auth-logo {
    height: 6rem;
    width: auto;
    margin-bottom: 1.2rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.auth-brand h1 {
    font-size: 2.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--main-color) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

/* ===================================
   Auth Header (Title + Description)
   =================================== */

.auth-header {
    text-align: center;
    margin-bottom: 3.2rem;
}

.auth-header h2 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    letter-spacing: -0.02em;
}

.auth-header p {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
}

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

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.form-group label {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.form-group label i {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 1.2rem 1.4rem;
    border: 1.5px solid var(--border-color);
    border-radius: 0.8rem;
    font-size: 1.5rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--white);
    transition: all 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(92, 192, 235, 0.1);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    padding: 1.4rem 2rem;
    border-radius: 0.8rem;
    font-size: 1.5rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--main-color) 0%, var(--accent-purple) 100%);
    color: var(--white);
    margin-top: 0.8rem;
    box-shadow: 0 2px 8px rgba(92, 192, 235, 0.2);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(92, 192, 235, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

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

/* ===================================
   Links
   =================================== */

a {
    text-decoration: none;
}

.link-primary {
    color: var(--main-color);
    font-weight: 600;
    transition: color 0.2s ease;
}

.link-primary:hover {
    color: var(--accent-purple);
    text-decoration: underline;
}

.link-secondary {
    color: var(--text-secondary);
    font-size: 1.4rem;
    transition: color 0.2s ease;
}

.link-secondary:hover {
    color: var(--main-color);
}

/* ===================================
   Auth Footer & Register Link
   =================================== */

.auth-footer {
    text-align: center;
    margin-top: 2rem;
}

.auth-register {
    text-align: center;
    margin-top: 2.4rem;
    padding-top: 2.4rem;
    border-top: 1px solid var(--border-color);
    font-size: 1.4rem;
    color: var(--text-secondary);
}

.auth-register span {
    margin-right: 0.4rem;
}

/* ===================================
   Divider
   =================================== */

.divider {
    display: flex;
    align-items: center;
    margin: 2.4rem 0 2rem;
    color: var(--text-tertiary);
    font-size: 1.3rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 1.6rem;
}

/* ===================================
   Social Login
   =================================== */

.social-login {
    display: flex;
    margin-bottom: 2.4rem;
}

.btn-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
    padding: 1.2rem 1.6rem;
    border: 1.5px solid #dadce0;
    border-radius: 0.8rem;
    background: var(--white);
    font-size: 1.5rem;
    font-weight: 500;
    color: #3c4043;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-social:hover {
    background: #f8f9fa;
    border-color: #d2d3d4;
    box-shadow: 0 1px 3px rgba(60, 64, 67, 0.12), 0 1px 2px rgba(60, 64, 67, 0.24);
}

.btn-social:active {
    background: #eceff1;
    border-color: #d2d3d4;
}

.btn-social svg {
    flex-shrink: 0;
}

/* ===================================
   Messages (Success/Error)
   =================================== */

.message {
    padding: 1.2rem 1.6rem;
    border-radius: 0.8rem;
    font-size: 1.4rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.message-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.message i {
    font-size: 1.6rem;
}

/* ===================================
   Loading State
   =================================== */

.btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1.6rem;
    height: 1.6rem;
    top: 50%;
    left: 50%;
    margin-left: -0.8rem;
    margin-top: -0.8rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spinner 0.6s linear infinite;
}

@keyframes spinner {
    to {
        transform: rotate(360deg);
    }
}

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

@media (max-width: 768px) {
    body {
        padding: 1.6rem;
    }

    .auth-container {
        padding: 3.2rem 2.4rem;
    }

    .auth-logo {
        height: 5rem;
    }

    .auth-brand h1 {
        font-size: 2rem;
    }

    .auth-header h2 {
        font-size: 2.4rem;
    }

    .back-link {
        margin-bottom: 2.4rem;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: 2.4rem 1.6rem;
    }

    .auth-header h2 {
        font-size: 2rem;
    }

    .form-group input {
        padding: 1rem 1.2rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */

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

/* ===================================
   Role Selection Styles
   =================================== */

.role-selection {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    margin-top: 0.8rem;
}

.role-option {
    cursor: pointer;
}

.role-option input[type="radio"] {
    display: none;
}

.role-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 1.2rem;
    background: #f9fafb;
    transition: all 0.3s ease;
    text-align: center;
}

.role-card i {
    font-size: 3.2rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.role-card span {
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.role-card small {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.role-option input[type="radio"]:checked + .role-card {
    border-color: var(--main-color);
    background: linear-gradient(135deg, var(--main-color) 0%, var(--accent-purple) 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.role-option input[type="radio"]:checked + .role-card i {
    color: var(--white);
}

.role-option input[type="radio"]:checked + .role-card span {
    color: var(--white);
}

.role-option input[type="radio"]:checked + .role-card small {
    color: rgba(255, 255, 255, 0.95);
}

.role-card:hover {
    border-color: var(--main-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

@media (max-width: 480px) {
    .role-selection {
        grid-template-columns: 1fr;
    }
    
    .role-card {
        padding: 1.6rem 1rem;
    }
    
    .role-card i {
        font-size: 2.8rem;
    }
}