/* RESET ET BASE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --edf-blue: #0055A4;
    --edf-light-blue: #0072CE;
    --edf-white: #FFFFFF;
    --edf-gray: #F5F7FA;
    --edf-dark: #2C3E50;
    --edf-green: #27AE60;
    --edf-orange: #E67E22;
    --edf-red: #E74C3C;
    --shadow: 0 4px 6px rgba(0, 85, 164, 0.1);
    --radius: 8px;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
    background: linear-gradient(135deg, var(--edf-gray) 0%, #FFFFFF 100%);
    color: var(--edf-dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* HEADER CORPORATE */
.corporate-header {
    background: linear-gradient(135deg, var(--edf-blue) 0%, var(--edf-light-blue) 100%);
    color: var(--edf-white);
    padding: 2rem 0;
    box-shadow: var(--shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
}

.logo-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* NAVIGATION PRO */
.corporate-nav {
    background: var(--edf-white);
    border-bottom: 3px solid var(--edf-blue);
    box-shadow: var(--shadow);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--edf-dark);
    font-weight: 500;
    padding: 1rem 0;
    display: block;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--edf-blue);
    border-bottom-color: var(--edf-blue);
}

/* MAIN CONTENT - STYLE TABLEAU DE BORD */
.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.section-card {
    background: var(--edf-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.section-header {
    background: linear-gradient(135deg, var(--edf-blue) 0%, var(--edf-light-blue) 100%);
    color: var(--edf-white);
    padding: 1.5rem 2rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.section-body {
    padding: 2rem;
}

/* FORMULAIRES PRO */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

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

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--edf-dark);
    font-size: 0.9rem;
}

.form-input {
    padding: 0.75rem 1rem;
    border: 2px solid #E1E8ED;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--edf-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--edf-blue);
    box-shadow: 0 0 0 3px rgba(0, 85, 164, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'><path fill='%230055A4' d='M2 0L0 2h4zm0 5L0 3h4z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 0.65rem;
}

/* BOUTONS CORPORATE */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--edf-blue) 0%, var(--edf-light-blue) 100%);
    color: var(--edf-white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 85, 164, 0.2);
}

.btn-secondary {
    background: var(--edf-gray);
    color: var(--edf-dark);
    border: 2px solid #E1E8ED;
}

.btn-danger {
    background: var(--edf-red);
    color: var(--edf-white);
}

/* CARTES D'ÉQUIPEMENT */
.equipment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.equipment-card {
    background: var(--edf-white);
    border: 2px solid #E1E8ED;
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.equipment-card:hover {
    border-color: var(--edf-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.equipment-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* TABLEAU DE BORD METRICS */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.metric-card {
    background: var(--edf-white);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--edf-blue);
}

.metric-card.total {
    border-left-color: var(--edf-green);
}

.metric-card.annual {
    border-left-color: var(--edf-orange);
}

.metric-card.co2 {
    border-left-color: var(--edf-red);
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0;
    color: var(--edf-dark);
}

.metric-label {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* TABLEAUX DE COÛTS */
.cost-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.cost-table th {
    background: var(--edf-gray);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--edf-dark);
    border-bottom: 2px solid #E1E8ED;
}

.cost-table td {
    padding: 1rem;
    border-bottom: 1px solid #E1E8ED;
}

.cost-table tr:hover {
    background: var(--edf-gray);
}

/* COMPARAISON CLOUD */
.cloud-comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.cloud-card {
    background: var(--edf-white);
    border: 2px solid #E1E8ED;
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.cloud-card:hover {
    border-color: var(--edf-blue);
    transform: translateY(-2px);
}

.cloud-provider {
    font-weight: 600;
    color: var(--edf-blue);
    margin-bottom: 0.5rem;
}

.cloud-price {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.cloud-savings {
    font-size: 0.9rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
}

.savings-positive {
    background: #D5F4E6;
    color: var(--edf-green);
}

.savings-negative {
    background: #FDEDEC;
    color: var(--edf-red);
}

/* FOOTER CORPORATE */
.corporate-footer {
    background: var(--edf-dark);
    color: var(--edf-white);
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    color: var(--edf-white);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-section a {
    color: #BDC3C7;
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--edf-white);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 0;
    border-top: 1px solid #34495E;
    text-align: center;
    color: #BDC3C7;
    font-size: 0.9rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 0;
    }
    
    .main-container {
        padding: 0 1rem;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

/* ANIMATIONS SUBTILES */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-card {
    animation: fadeIn 0.5s ease-out;
}

/* LOADING STATES */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.progress-bar {
    height: 4px;
    background: linear-gradient(135deg, var(--edf-blue) 0%, var(--edf-light-blue) 100%);
    border-radius: 2px;
    margin-top: 0.5rem;
}