/* =================================================================
   PROFILE PROFESSIONAL STYLES - StudyHub
   Diseño profesional avanzado para el perfil de usuario con
   características modernas y experiencia de usuario optimizada
================================================================= */

/* Variables específicas para perfil */
:root {
    --profile-gradient-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --profile-secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --profile-card-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    --profile-card-hover-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    --profile-header-bg: rgba(255, 255, 255, 0.95);
    --profile-border: rgba(102, 126, 234, 0.2);
    --profile-accent: #667eea;
    --profile-accent-light: #f8faff;
    
    /* Colores para badges */
    --badge-verified: #2ecc71;
    --badge-premium: #f39c12;
    --badge-member: #3498db;
    
    /* Avatar colors */
    --avatar-ring: linear-gradient(135deg, #667eea, #764ba2);
    --avatar-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

/* Header profesional del perfil */
.profile-header-modern {
    background: var(--profile-header-bg);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 30px;
    border: 1px solid var(--profile-border);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.profile-header-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--profile-gradient-bg);
    z-index: 1;
}

.profile-header-modern::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    z-index: 0;
}

/* Título del header */
.profile-title {
    display: flex;
    align-items: center;
    gap: 15px;
    position: relative;
    z-index: 2;
    margin-bottom: 10px;
}

.profile-title h2 {
    color: var(--text-primary);
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}

.profile-title i {
    font-size: 1.5rem;
    color: var(--profile-accent);
}

/* Subtítulo del header */
.profile-subtitle {
    position: relative;
    z-index: 2;
}

.profile-subtitle p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
    opacity: 0.9;
}

/* Contenedor principal del perfil */
.profile-container {
    max-width: 800px;
    margin: 0 auto;
}

.profile-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--profile-card-shadow);
    border: 1px solid var(--border-color);
    overflow: hidden;
    position: relative;
    transition: all var(--transition-medium);
}

.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--profile-card-hover-shadow);
}

/* Header del perfil */
.profile-header {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.1) 0%, 
        rgba(118, 75, 162, 0.05) 100%
    );
    padding: 40px 30px;
    display: flex;
    align-items: center;
    gap: 30px;
    position: relative;
    border-bottom: 1px solid var(--border-light);
}

.profile-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(102,126,234,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.profile-header > * {
    position: relative;
    z-index: 1;
}

/* Avatar mejorado */
.profile-avatar {
    position: relative;
    flex-shrink: 0;
}

.profile-avatar img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid white;
    box-shadow: var(--avatar-shadow);
    background: var(--bg-secondary);
    transition: all var(--transition-medium);
}

.profile-avatar::before {
    content: '';
    position: absolute;
    top: -6px;
    left: -6px;
    right: -6px;
    bottom: -6px;
    border-radius: 50%;
    background: var(--avatar-ring);
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.profile-avatar:hover::before {
    opacity: 1;
}

.profile-avatar:hover img {
    transform: scale(1.05);
}

/* Botón de upload del avatar */
.avatar-upload-btn {
    position: absolute;
    bottom: 8px;
    right: 8px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--profile-accent);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transition: all var(--transition-fast);
    z-index: 2;
}

.avatar-upload-btn:hover {
    background: #5a6fd8;
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.6);
}

.avatar-upload-btn i {
    font-size: 0.875rem;
}

/* Información del perfil */
.profile-info {
    flex: 1;
    min-width: 0;
}

.profile-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.profile-info p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-info p i {
    color: var(--profile-accent);
    font-size: 0.875rem;
}

/* Badge/Role del perfil */
.profile-role {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: var(--profile-accent);
    color: white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.profile-role.verified {
    background: var(--badge-verified);
    box-shadow: 0 2px 8px rgba(46, 204, 113, 0.3);
}

.profile-role.premium {
    background: var(--badge-premium);
    box-shadow: 0 2px 8px rgba(243, 156, 18, 0.3);
}

.profile-role.member {
    background: var(--badge-member);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.profile-role i {
    font-size: 0.75rem;
}

/* Formulario del perfil */
.profile-form {
    padding: 30px;
    background: var(--bg-primary);
}

.profile-form .form-group {
    margin-bottom: 24px;
}

.profile-form .form-group:last-child {
    margin-bottom: 0;
}

.profile-form label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.profile-form label i {
    color: var(--profile-accent);
    font-size: 0.875rem;
    width: 16px;
}

.profile-form input,
.profile-form textarea,
.profile-form select {
    width: 100%;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 14px 16px;
    font-size: 0.95rem;
    transition: all var(--transition-medium);
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.profile-form input:focus,
.profile-form textarea:focus,
.profile-form select:focus {
    border-color: var(--profile-accent);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
    background: var(--profile-accent-light);
}

.profile-form input::placeholder,
.profile-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Grupo especial para username */
.username-group {
    display: flex;
    gap: 12px;
    align-items: stretch;
}

.username-group input {
    flex: 1;
    margin-bottom: 0;
}

.username-group .btn {
    flex: 0 0 auto;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Ayuda del formulario */
.form-help {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 6px;
    opacity: 0.8;
}

/* Botón principal del perfil */
.profile-form .btn-primary {
    background: var(--profile-gradient-bg);
    border: none;
    color: white;
    padding: 16px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-medium);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    margin-top: 20px;
}

.profile-form .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5a6fd8 0%, #6a5acd 100%);
}

.profile-form .btn-primary:active {
    transform: translateY(0);
}

.profile-form .btn-primary i {
    font-size: 0.9rem;
}

/* Botón outline mejorado */
.profile-form .btn-outline {
    background: transparent;
    border: 2px solid var(--profile-accent);
    color: var(--profile-accent);
    transition: all var(--transition-medium);
}

.profile-form .btn-outline:hover {
    background: var(--profile-accent);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Sección de estadísticas del perfil (si se agrega en el futuro) */
.profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 30px;
    padding: 20px 0;
    border-top: 1px solid var(--border-light);
}

.profile-stat {
    text-align: center;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-medium);
}

.profile-stat:hover {
    background: var(--profile-accent-light);
    border-color: var(--profile-accent);
    transform: translateY(-2px);
}

.profile-stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--profile-accent);
    display: block;
    margin-bottom: 4px;
}

.profile-stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Animaciones de entrada */
.profile-card {
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Estados de carga para el avatar */
.avatar-loading {
    position: relative;
}

.avatar-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-top-color: var(--profile-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* =================================================================
   RESPONSIVE DESIGN PROFESIONAL
================================================================= */

@media (max-width: 768px) {
    .profile-container {
        margin: 0 15px;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 30px 20px;
    }
    
    .profile-avatar img {
        width: 100px;
        height: 100px;
    }
    
    .profile-info h3 {
        font-size: 1.5rem;
    }
    
    .profile-form {
        padding: 20px;
    }
    
    .username-group {
        flex-direction: column;
        gap: 10px;
    }
    
    .username-group .btn {
        justify-content: center;
    }
    
    .profile-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .profile-header {
        padding: 20px 15px;
    }
    
    .profile-avatar img {
        width: 80px;
        height: 80px;
    }
    
    .avatar-upload-btn {
        width: 30px;
        height: 30px;
        bottom: 4px;
        right: 4px;
    }
    
    .avatar-upload-btn i {
        font-size: 0.75rem;
    }
    
    .profile-info h3 {
        font-size: 1.25rem;
    }
    
    .profile-form {
        padding: 15px;
    }
    
    .profile-form input,
    .profile-form textarea,
    .profile-form select {
        padding: 12px 14px;
        font-size: 0.9rem;
    }
    
    .profile-form .btn-primary {
        padding: 14px 24px;
        font-size: 0.9rem;
    }
    
    .profile-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .profile-stat {
        padding: 15px;
    }
}

/* =================================================================
   MODO OSCURO
================================================================= */

[data-theme="dark"] {
    --profile-header-bg: rgba(45, 55, 72, 0.95);
    --profile-border: rgba(102, 126, 234, 0.3);
    --profile-accent-light: rgba(102, 126, 234, 0.1);
}

[data-theme="dark"] .profile-header {
    background: linear-gradient(135deg, 
        rgba(102, 126, 234, 0.15) 0%, 
        rgba(118, 75, 162, 0.1) 100%
    );
}

[data-theme="dark"] .profile-avatar img {
    border-color: var(--bg-secondary);
}

[data-theme="dark"] .profile-form input:focus,
[data-theme="dark"] .profile-form textarea:focus,
[data-theme="dark"] .profile-form select:focus {
    background: rgba(102, 126, 234, 0.05);
}

[data-theme="dark"] .profile-stat {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .profile-stat:hover {
    background: rgba(102, 126, 234, 0.1);
}

/* =================================================================
   ELEMENTOS ADICIONALES PARA MEJOR UX
================================================================= */

/* Indicador de éxito en formulario */
.form-success {
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.3);
    color: #27ae60;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
}

.form-success i {
    color: #27ae60;
}

/* Indicador de error en formulario */
.form-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
}

.form-error i {
    color: #e74c3c;
}

/* Campo con error */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* Campo con éxito */
.form-group.success input,
.form-group.success textarea,
.form-group.success select {
    border-color: #27ae60;
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

/* Avatar moderno mejorado */
.profile-avatar-modern {
    text-align: center;
    margin-bottom: 25px;
    position: relative;
    z-index: 2;
}

.avatar-container-modern {
    position: relative;
    display: inline-block;
    padding: 4px;
    background: var(--profile-gradient-bg);
    border-radius: 50%;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.avatar-container-modern::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--profile-gradient-bg);
    border-radius: 50%;
    z-index: -1;
    filter: blur(8px);
    opacity: 0.6;
}

.avatar-image-modern {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-primary);
    display: block;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.avatar-image-modern:hover {
    transform: scale(1.05);
}

.avatar-placeholder-modern {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--profile-gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--bg-primary);
    font-size: 2.5rem;
    color: white;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.avatar-placeholder-modern:hover {
    transform: scale(1.05);
}

/* Información del perfil */
.profile-info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.profile-info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--profile-border);
    border-radius: var(--border-radius-lg);
    padding: 25px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.profile-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--profile-gradient-bg);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.profile-info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.15);
    border-color: var(--profile-accent);
}

.profile-info-card:hover::before {
    opacity: 1;
}

.profile-info-card h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-info-card h3 i {
    color: var(--profile-accent);
    font-size: 1.1rem;
}