/* =====================
   UPGRADE ETABLISSEMENT
   ===================== */

:root {
    --orange: #FF9500;
}

/* Layout */
body {
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--bg-light);
    padding-top: 80px;
}

.container {
    max-width: 700px;
    width: 100%;
    margin: 40px auto;
    background: white;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Header */
.header {
    position: static !important;
    background: transparent !important;
    box-shadow: none !important;
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--bg-light);
}

.header-icon {
    font-size: 56px;
    margin-bottom: var(--space-sm);
    display: inline-block;
}

.header h1 {
    font-size: clamp(24px, 5vw, 36px);
    font-weight: 800;
    margin-bottom: var(--space-xs);
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    font-size: 16px;
    color: var(--gray);
    font-weight: 500;
}

/* Form Section */
.form-section {
    margin-bottom: var(--space-lg);
}

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

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
    font-weight: 700;
    font-size: 16px;
    color: var(--dark);
}

.form-group label i {
    color: var(--primary);
    font-size: 18px;
}

.form-group input[type="number"] {
    width: 100%;
    background: var(--bg-light);
    border: 3px solid transparent;
    color: var(--dark);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: 24px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
    text-align: center;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Plan Toggles */
.plan-toggles {
    display: flex;
    gap: 12px;
}

.plan-toggle {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--gray-light);
    background: white;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    color: var(--gray);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.plan-toggle.active {
    background: var(--gradient-main);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-sm);
}

.plan-toggle:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

/* Info Box */
.info-box {
    background: linear-gradient(135deg, rgba(255, 149, 0, 0.08) 0%, rgba(255, 230, 109, 0.08) 100%);
    border: 2px solid var(--orange);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.info-box h3 {
    font-size: 16px;
    color: var(--orange);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.info-box ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.info-box li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--dark);
    line-height: 1.5;
}

.info-box li strong {
    color: var(--orange);
}

/* Grille Tarifaire */
.grille-tarifaire {
    background: var(--bg-light);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.grille-tarifaire h3 {
    font-size: 16px;
    margin-bottom: var(--space-md);
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.grille-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.grille-row:last-child {
    border-bottom: none;
}

.grille-row span {
    color: var(--gray);
    font-size: 14px;
}

.grille-row strong {
    color: var(--primary);
    font-size: 15px;
    font-weight: 700;
}

.grille-row.highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-radius: var(--radius-sm);
    margin-top: 8px;
}

.grille-row.highlight strong {
    color: var(--purple);
    font-size: 17px;
}

/* Price Display */
.price-display {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
    border: 3px solid var(--purple);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(167, 139, 250, 0.2);
}

.price-row:last-child {
    border-bottom: none;
    padding-top: var(--space-md);
    margin-top: var(--space-sm);
}

.price-row span {
    font-size: 14px;
    color: var(--gray);
}

.price-row strong {
    font-size: 16px;
    color: var(--dark);
    font-weight: 700;
}

.price-row.total strong {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons */
.buttons-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: var(--space-lg);
}

.btn {
    width: 100%;
    background: var(--gradient-main);
    color: white;
    border: none;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--shadow-md);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-primary {
    background: var(--gradient-main);
}

.btn-secondary {
    background: linear-gradient(135deg, #4facfe 0%, #00d4ff 100%);
}

/* Loading */
.loading {
    display: none;
    text-align: center;
    padding: var(--space-xl);
}

.loading.active {
    display: block;
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--space-md);
    border: 4px solid var(--bg-light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading p {
    color: var(--gray);
    font-weight: 600;
}

/* Avantages */
.avantages {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 2px solid var(--bg-light);
}

.avantages h3 {
    font-size: 20px;
    text-align: center;
    margin-bottom: var(--space-lg);
    color: var(--dark);
}

.avantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.avantage-item {
    text-align: center;
    padding: var(--space-md);
    background: var(--bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.avantage-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.avantage-item i {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: var(--space-sm);
}

.avantage-item h4 {
    font-size: 14px;
    margin-bottom: 4px;
    color: var(--dark);
}

.avantage-item p {
    font-size: 12px;
    color: var(--gray);
}

/* ========================================
   MOBILE RESPONSIVE - EXPERIENCE AEREE
   ======================================== */

/* Tablettes - 768px */
@media (max-width: 768px) {
    body {
        padding-top: 70px;
        background: var(--bg-light);
    }

    .container {
        margin: 24px 20px;
        padding: 40px 28px;
        border-radius: 28px;
    }

    .header {
        margin-bottom: 40px;
        padding-bottom: 32px;
    }

    .header-icon {
        font-size: 52px;
        margin-bottom: 16px;
    }

    .header h1 {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .header p {
        font-size: 16px;
        line-height: 1.6;
    }

    .form-section {
        margin-bottom: 32px;
    }

    .form-group {
        margin-bottom: 28px;
    }

    .form-group label {
        font-size: 16px;
        margin-bottom: 14px;
    }

    .form-group input[type="number"] {
        padding: 20px;
        font-size: 24px;
        border-radius: 16px;
    }

    .plan-toggles {
        flex-direction: column;
        gap: 14px;
    }

    .plan-toggle {
        padding: 18px 24px;
        font-size: 15px;
        border-radius: 14px;
    }

    .info-box {
        padding: 28px 24px;
        margin-bottom: 28px;
        border-radius: 16px;
    }

    .info-box h3 {
        font-size: 16px;
        margin-bottom: 16px;
    }

    .info-box li {
        font-size: 14px;
        padding: 8px 0;
        line-height: 1.6;
    }

    .grille-tarifaire {
        padding: 28px 24px;
        margin-bottom: 28px;
        border-radius: 16px;
    }

    .grille-tarifaire h3 {
        font-size: 16px;
        margin-bottom: 20px;
    }

    .grille-row {
        padding: 14px 18px;
        margin-bottom: 4px;
    }

    .grille-row span {
        font-size: 14px;
    }

    .grille-row strong {
        font-size: 15px;
    }

    .price-display {
        padding: 28px 24px;
        margin-bottom: 28px;
        border-radius: 20px;
    }

    .price-row {
        padding: 14px 0;
    }

    .price-row span {
        font-size: 14px;
    }

    .price-row strong {
        font-size: 16px;
    }

    .price-row.total strong {
        font-size: 28px;
    }

    .buttons-container {
        gap: 16px;
        margin-bottom: 32px;
    }

    .btn {
        padding: 18px 24px;
        font-size: 16px;
        border-radius: 14px;
    }

    .avantages {
        margin-top: 48px;
        padding-top: 48px;
    }

    .avantages h3 {
        font-size: 20px;
        margin-bottom: 28px;
    }

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

    .avantage-item {
        padding: 20px 16px;
        border-radius: 16px;
    }

    .avantage-item i {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .avantage-item h4 {
        font-size: 14px;
        margin-bottom: 6px;
    }

    .avantage-item p {
        font-size: 12px;
        line-height: 1.5;
    }
}

/* Petits mobiles - 480px */
@media (max-width: 480px) {
    body {
        padding-top: 60px;
    }

    .container {
        margin: 16px 12px;
        padding: 32px 20px;
        border-radius: 24px;
    }

    .header {
        margin-bottom: 36px;
        padding-bottom: 28px;
    }

    .header-icon {
        font-size: 48px;
        margin-bottom: 14px;
    }

    .header h1 {
        font-size: 24px;
        margin-bottom: 10px;
    }

    .header p {
        font-size: 15px;
        line-height: 1.5;
    }

    .form-section {
        margin-bottom: 28px;
    }

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

    .form-group label {
        font-size: 15px;
        margin-bottom: 12px;
    }

    .form-group input[type="number"] {
        padding: 18px;
        font-size: 22px;
        border-radius: 14px;
    }

    .plan-toggles {
        gap: 12px;
    }

    .plan-toggle {
        padding: 16px 20px;
        font-size: 14px;
        border-radius: 12px;
    }

    .info-box {
        padding: 24px 20px;
        margin-bottom: 24px;
        border-radius: 14px;
    }

    .info-box h3 {
        font-size: 15px;
        margin-bottom: 14px;
    }

    .info-box li {
        font-size: 13px;
        padding: 6px 0;
        line-height: 1.5;
    }

    .grille-tarifaire {
        padding: 24px 20px;
        margin-bottom: 24px;
        border-radius: 14px;
    }

    .grille-tarifaire h3 {
        font-size: 15px;
        margin-bottom: 16px;
    }

    .grille-row {
        padding: 12px 14px;
        margin-bottom: 2px;
        border-radius: 8px;
    }

    .grille-row span {
        font-size: 13px;
    }

    .grille-row strong {
        font-size: 14px;
    }

    .grille-row.highlight {
        margin-top: 10px;
        padding: 14px;
    }

    .grille-row.highlight strong {
        font-size: 16px;
    }

    .price-display {
        padding: 24px 20px;
        margin-bottom: 24px;
        border-radius: 18px;
    }

    .price-row {
        padding: 12px 0;
    }

    .price-row span {
        font-size: 13px;
    }

    .price-row strong {
        font-size: 15px;
    }

    .price-row.total {
        padding-top: 16px;
        margin-top: 8px;
    }

    .price-row.total strong {
        font-size: 26px;
    }

    .buttons-container {
        gap: 14px;
        margin-bottom: 28px;
    }

    .btn {
        padding: 16px 20px;
        font-size: 15px;
        border-radius: 12px;
    }

    .avantages {
        margin-top: 40px;
        padding-top: 40px;
    }

    .avantages h3 {
        font-size: 18px;
        margin-bottom: 24px;
    }

    .avantages-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .avantage-item {
        display: flex;
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 16px;
        padding: 18px 20px;
        border-radius: 14px;
    }

    .avantage-item i {
        margin-bottom: 0;
        font-size: 26px;
        min-width: 36px;
        text-align: center;
    }

    .avantage-item > div {
        flex: 1;
    }

    .avantage-item h4 {
        font-size: 14px;
        margin-bottom: 4px;
    }

    .avantage-item p {
        font-size: 12px;
        line-height: 1.4;
    }

    /* Loading states */
    .loading {
        padding: 48px 24px;
    }

    .spinner {
        width: 44px;
        height: 44px;
    }

    .loading p {
        font-size: 14px;
    }
}

/* Tres petits mobiles - 360px */
@media (max-width: 360px) {
    .container {
        margin: 12px 8px;
        padding: 28px 16px;
    }

    .header h1 {
        font-size: 22px;
    }

    .header p {
        font-size: 14px;
    }

    .form-group input[type="number"] {
        padding: 16px;
        font-size: 20px;
    }

    .plan-toggle {
        padding: 14px 16px;
        font-size: 13px;
    }

    .info-box,
    .grille-tarifaire,
    .price-display {
        padding: 20px 16px;
    }

    .btn {
        padding: 14px 18px;
        font-size: 14px;
    }

    .price-row.total strong {
        font-size: 24px;
    }

    .avantage-item {
        padding: 16px;
        gap: 14px;
    }

    .avantage-item i {
        font-size: 24px;
        min-width: 32px;
    }
}

/* Touch devices - zones de tap plus grandes */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .plan-toggle {
        min-height: 56px;
    }

    .form-group input[type="number"] {
        min-height: 60px;
    }

    .avantage-item {
        min-height: 54px;
    }

    .grille-row {
        min-height: 48px;
    }

    /* Active states pour feedback tactile */
    .btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }

    .plan-toggle:active {
        transform: scale(0.98);
    }
}

/* Landscape phones */
@media (max-width: 768px) and (orientation: landscape) {
    .container {
        margin: 20px auto;
        max-width: 600px;
        padding: 32px 28px;
    }

    .header {
        margin-bottom: 28px;
        padding-bottom: 24px;
    }

    .avantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .avantage-item {
        flex-direction: column;
        text-align: center;
        padding: 16px 14px;
    }

    .avantage-item i {
        margin-bottom: 10px;
        min-width: auto;
    }
}

/* Safe area pour iPhone avec notch */
@supports (padding: max(0px)) {
    @media (max-width: 480px) {
        body {
            padding-left: max(12px, env(safe-area-inset-left));
            padding-right: max(12px, env(safe-area-inset-right));
            padding-bottom: max(20px, env(safe-area-inset-bottom));
        }

        .container {
            margin-left: 0;
            margin-right: 0;
        }
    }
}