:root {
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-200: #bbf7d0;
    --green-300: #86efac;
    --green-400: #4ade80;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    --green-800: #166534;
    --green-900: #14532d;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    min-height: 100vh;
    line-height: 1.5;
}

.hidden {
    display: none !important;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== LOGIN ===== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--green-400) 0%, var(--green-700) 100%);
    padding: 20px;
}

.login-card {
    background: white;
    padding: 48px 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    max-width: 420px;
    width: 100%;
    text-align: center;
}

.logo {
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 56px;
    margin-bottom: 8px;
}

.logo h1 {
    font-size: 32px;
    color: var(--green-700);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.tagline {
    color: var(--gray-500);
    margin: 12px 0 32px;
    font-size: 15px;
}

.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-google:hover {
    border-color: var(--green-500);
    background: var(--green-50);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.login-footer {
    margin-top: 24px;
    font-size: 12px;
    color: var(--gray-500);
}

/* ===== NAVBAR ===== */
.navbar {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
    color: var(--green-700);
    cursor: pointer;
}

.nav-logo {
    font-size: 24px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--gray-700);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.15s;
}

.nav-link:hover {
    background: var(--green-50);
    color: var(--green-700);
}

.nav-link.active {
    background: var(--green-100);
    color: var(--green-700);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: 16px;
    padding-left: 16px;
    border-left: 1px solid var(--gray-200);
}

.nav-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--green-200);
    object-fit: cover;
}

.btn-logout {
    background: none;
    border: 1px solid var(--gray-200);
    padding: 6px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    color: var(--gray-700);
    transition: all 0.15s;
}

.btn-logout:hover {
    background: var(--gray-100);
}

/* ===== MAIN ===== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 28px;
    gap: 16px;
    flex-wrap: wrap;
}

.page-header h2 {
    font-size: 28px;
    color: var(--gray-900);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--gray-500);
    font-size: 14px;
    margin-top: 4px;
}

/* ===== BUTTONS ===== */
.btn-primary {
    background: var(--green-600);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s;
}

.btn-primary:hover {
    background: var(--green-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary span {
    font-size: 18px;
    font-weight: 600;
}

.btn-secondary {
    background: white;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-secondary:hover {
    background: var(--gray-50);
}

.btn-back {
    background: none;
    border: none;
    color: var(--green-700);
    font-size: 14px;
    cursor: pointer;
    margin-bottom: 20px;
    padding: 6px 0;
    font-weight: 500;
}

.btn-back:hover {
    color: var(--green-800);
}

/* ===== PETS GRID ===== */
.pets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.pet-card {
    background: white;
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--gray-200);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.pet-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--green-300);
}

.pet-avatar {
    width: 88px;
    height: 88px;
    background: var(--green-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 44px;
    margin-bottom: 16px;
}

.pet-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.pet-meta {
    color: var(--gray-500);
    font-size: 13px;
    margin-bottom: 12px;
}

.pet-badge {
    display: inline-block;
    background: var(--green-50);
    color: var(--green-700);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 999px;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state-icon {
    font-size: 56px;
    margin-bottom: 12px;
}

/* ===== PET DETAIL ===== */
.pet-detail-header {
    background: linear-gradient(135deg, var(--green-500), var(--green-700));
    border-radius: 20px;
    padding: 32px;
    color: white;
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

.pet-detail-avatar {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    flex-shrink: 0;
}

.pet-detail-info h2 {
    font-size: 32px;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.pet-detail-info p {
    opacity: 0.9;
    margin-bottom: 4px;
}

.detail-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }
}

.detail-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    padding: 24px;
}

.detail-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--gray-900);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.info-item label {
    display: block;
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item span {
    font-size: 15px;
    color: var(--gray-900);
    font-weight: 500;
}

.carnet-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.carnet-actions button {
    width: 100%;
    justify-content: center;
}

/* ===== PROFILE ===== */
.profile-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    border: 1px solid var(--gray-200);
    max-width: 480px;
    margin: 0 auto;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid var(--green-200);
    margin-bottom: 16px;
    object-fit: cover;
}

.profile-card h3 {
    font-size: 24px;
    margin-bottom: 4px;
}

.profile-card p {
    color: var(--gray-500);
    margin-bottom: 24px;
}

.profile-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--green-700);
}

.stat-label {
    font-size: 13px;
    color: var(--gray-500);
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: white;
    border-radius: 20px;
    padding: 28px;
    max-width: 480px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

.modal-large {
    max-width: 720px;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--gray-500);
    line-height: 1;
    padding: 0 4px;
}

.modal-close:hover {
    color: var(--gray-900);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

/* ===== FORM ===== */
.form-group {
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    transition: all 0.15s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px var(--green-100);
}

.emoji-picker {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.emoji-btn {
    width: 44px;
    height: 44px;
    background: var(--gray-100);
    border: 2px solid transparent;
    border-radius: 10px;
    font-size: 22px;
    cursor: pointer;
    transition: all 0.15s;
}

.emoji-btn:hover {
    background: var(--green-50);
}

.emoji-btn.selected {
    background: var(--green-100);
    border-color: var(--green-500);
}

/* ===== CARNET ===== */
.carnet {
    background: white;
    border: 2px solid var(--green-700);
    border-radius: 12px;
    padding: 28px;
    font-family: 'Georgia', serif;
}

.carnet-header {
    text-align: center;
    border-bottom: 2px solid var(--green-700);
    padding-bottom: 16px;
    margin-bottom: 20px;
}

.carnet-header h2 {
    color: var(--green-700);
    font-size: 22px;
    margin-bottom: 4px;
}

.carnet-header p {
    color: var(--gray-500);
    font-size: 13px;
}

.carnet-pet-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    background: var(--green-50);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-family: -apple-system, sans-serif;
}

.carnet-pet-info div {
    font-size: 13px;
}

.carnet-pet-info strong {
    color: var(--gray-700);
    display: block;
    text-transform: uppercase;
    font-size: 11px;
    margin-bottom: 2px;
}

.carnet table {
    width: 100%;
    border-collapse: collapse;
    font-family: -apple-system, sans-serif;
    font-size: 13px;
}

.carnet th {
    background: var(--green-700);
    color: white;
    padding: 10px;
    text-align: left;
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
}

.carnet td {
    padding: 10px;
    border-bottom: 1px solid var(--gray-200);
}

.carnet tr:last-child td {
    border-bottom: none;
}

.vaccine-status {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
}

.status-applied {
    background: var(--green-100);
    color: var(--green-700);
}

.status-pending {
    background: #fef3c7;
    color: #92400e;
}

.carnet-footer {
    margin-top: 20px;
    text-align: center;
    color: var(--gray-500);
    font-size: 12px;
    font-family: -apple-system, sans-serif;
    padding-top: 16px;
    border-top: 1px dashed var(--gray-300);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .navbar {
        padding: 0 16px;
    }
    .nav-link {
        padding: 6px 10px;
        font-size: 13px;
    }
    .nav-user {
        margin-left: 8px;
        padding-left: 8px;
    }
    .main-content {
        padding: 20px 16px;
    }
    .pet-detail-header {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ===== ADDED: error states + detail actions ===== */
.login-error { color: #b91c1c; font-size: 13px; margin-top: 12px; text-align: center; }
.error { color: #b91c1c; padding: 12px; }
.detail-actions { margin-top: 16px; display: flex; gap: 8px; }
#google-signin-btn { display: flex; justify-content: center; margin: 12px 0; }