/* Variables CSS - Palette "Soleil de 18h30" Version Terminal */
:root {
    --ambre-fonce: #2B2A2E;
    --brun-cendre: #4A4644;
    --or-pale: #FFF5E1;
    --bourgogne-profond: #5C2E35;
    --degrade-rayons: linear-gradient(135deg, #E4774C 0%, #FFB894 100%);
    
    /* Transitions et animations */
    --transition-fast: 0.2s ease-out;
    --transition-medium: 0.4s ease-out;
    --transition-slow: 0.8s ease-out;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
}

/* Reset et Base */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--ambre-fonce);
    color: var(--or-pale);
    line-height: 1.6;
}

/* Conteneur Principal */
#terminal-contact {
    position: relative;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Arrière-plan Animé Blueprint */
.background-animation-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--ambre-fonce);
    z-index: -1;
}

#blueprint-grid-background {
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(255, 245, 225, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 245, 225, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    animation: blueprintMove 30s linear infinite;
}

@keyframes blueprintMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(40px, 40px);
    }
}

/* Section Héro - Terminal Header */
.terminal-hero {
    padding: var(--spacing-xxl) var(--spacing-md) var(--spacing-xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.terminal-header {
    max-width: 800px;
    margin: 0 auto;
}

#terminal-title {
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 600;
    color: var(--or-pale);
    margin: 0 0 var(--spacing-md);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
}

#terminal-title::after {
    content: '|';
    color: var(--or-pale);
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.terminal-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: rgba(255, 245, 225, 0.7);
    margin: 0;
    font-weight: 300;
    max-width: 600px;
    margin: 0 auto;
}

/* Section Formulaire */
.terminal-form-section {
    padding: var(--spacing-xl) var(--spacing-md);
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.form-card {
    background-color: var(--brun-cendre);
    border: 1px solid rgba(255, 245, 225, 0.2);
    border-radius: 8px;
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 600px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 245, 225, 0.1);
    backdrop-filter: blur(10px);
}

.collaboration-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Wrapper de Champs */
.field-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.field-wrapper label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--or-pale);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

/* Champs de Saisie */
.field-wrapper input,
.field-wrapper textarea,
.field-wrapper select {
    background-color: var(--bourgogne-profond);
    border: none;
    border-radius: 4px;
    padding: var(--spacing-md);
    color: var(--or-pale);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-medium);
    outline: none;
    width: 100%;
}

.field-wrapper input::placeholder,
.field-wrapper textarea::placeholder {
    color: rgba(255, 245, 225, 0.4);
}

.field-wrapper textarea {
    min-height: 120px;
    resize: vertical;
}

/* Ligne de Focus */
.field-line {
    height: 1px;
    background-color: rgba(255, 245, 225, 0.3);
    margin-top: -1px;
    transition: all var(--transition-medium);
    transform: scaleX(0);
    transform-origin: left;
}

.field-wrapper input:focus + .field-line,
.field-wrapper textarea:focus + .field-line,
.field-wrapper select:focus + .field-line {
    transform: scaleX(1);
    height: 2px;
    background: var(--degrade-rayons);
    box-shadow: 0 0 8px rgba(228, 119, 76, 0.3);
}

.field-wrapper input:focus,
.field-wrapper textarea:focus,
.field-wrapper select:focus {
    background-color: rgba(92, 46, 53, 0.8);
    box-shadow: 
        0 0 0 1px rgba(255, 245, 225, 0.2),
        0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Bouton de Soumission */
.submit-button {
    position: relative;
    background: var(--degrade-rayons);
    border: none;
    border-radius: 6px;
    padding: var(--spacing-md) var(--spacing-xl);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: all var(--transition-medium);
    overflow: hidden;
    margin-top: var(--spacing-md);
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(228, 119, 76, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2);
}

.submit-button:active {
    transform: translateY(0);
}

.submit-text {
    position: relative;
    z-index: 2;
    transition: opacity var(--transition-medium);
}

.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(135deg, #FFB894 0%, #E4774C 100%);
    transition: width var(--transition-slow);
    z-index: 1;
}

.submit-button.is-loading .progress-bar {
    width: 100%;
}

.submit-button.is-loading .submit-text {
    opacity: 0.7;
}

/* Section WhatsApp Gate */
.whatsapp-gate {
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-xxl);
    text-align: center;
    position: relative;
    z-index: 1;
}

.whatsapp-gate-content {
    max-width: 500px;
    margin: 0 auto;
}

.whatsapp-gate h2 {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    color: var(--or-pale);
    margin: 0 0 var(--spacing-md);
    font-weight: 500;
}

.whatsapp-gate p {
    color: rgba(255, 245, 225, 0.7);
    margin: 0 0 var(--spacing-lg);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Lien WhatsApp */
.whatsapp-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid rgba(255, 245, 225, 0.3);
    border-radius: 50px;
    color: var(--or-pale);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all var(--transition-medium);
    background-color: transparent;
    position: relative;
    overflow: hidden;
}

.whatsapp-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--degrade-rayons);
    transition: left var(--transition-medium);
    z-index: -1;
}

.whatsapp-link:hover {
    border-color: var(--or-pale);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(228, 119, 76, 0.2);
}

.whatsapp-link:hover::before {
    left: 0;
}

.whatsapp-link svg {
    transition: transform var(--transition-medium);
}

.whatsapp-link:hover svg {
    transform: scale(1.1);
}

/* États d'erreur pour les champs */
.field-wrapper.has-error input,
.field-wrapper.has-error textarea,
.field-wrapper.has-error select {
    border: 1px solid #e74c3c;
    background-color: rgba(231, 76, 60, 0.1);
}

.field-wrapper.has-error .field-line {
    background-color: #e74c3c;
    transform: scaleX(1);
    height: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .terminal-hero {
        padding: var(--spacing-xl) var(--spacing-sm) var(--spacing-lg);
    }
    
    .terminal-form-section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .form-card {
        padding: var(--spacing-lg);
    }
    
    .collaboration-form {
        gap: var(--spacing-md);
    }
    
    .submit-button {
        padding: var(--spacing-md);
        font-size: 1rem;
    }
    
    .whatsapp-gate {
        padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-xl);
    }
    
    .whatsapp-link {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.4rem;
        --spacing-sm: 0.8rem;
        --spacing-md: 1.2rem;
        --spacing-lg: 1.6rem;
        --spacing-xl: 2.4rem;
        --spacing-xxl: 3.2rem;
    }
    
    #terminal-title {
        font-size: 1.6rem;
    }
    
    .terminal-subtitle {
        font-size: 0.95rem;
    }
    
    .field-wrapper input,
    .field-wrapper textarea {
        padding: var(--spacing-sm);
    }
}

/* Animation d'apparition pour les éléments */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-slow);
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* États pour les animations JavaScript */
.field-wrapper.is-focused .field-line {
    transform: scaleX(1);
    height: 2px;
    background: var(--degrade-rayons);
}

.submit-button.is-submitting {
    pointer-events: none;
}

.submit-button.is-submitting .submit-text::after {
    content: '...';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}