:root {
    --color-ivory: #FFFFF0; /* Zacht, warm ivory */
    --color-midnight: #06005c; /* Middernachtblauw */
    --font-serif: 'Cormorant Garamond', serif;
    --font-sans: 'Inter', sans-serif;
    --transition-smooth: 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-snappy: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--color-ivory);
    /* Subtiel verloop voor diepte zonder druk te zijn */
    background-image: linear-gradient(135deg, #FFFAF0 0%, #FDF5E6 100%);
    color: var(--color-midnight);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Abstract Noise Overlay voor een 'analoge' textuur */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    z-index: 1;
    min-height: 100vh;
    justify-content: center;
}

/* Animaties: Staggered fades */
.fade-in {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    will-change: opacity, transform;
}

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

.anim-delay-1 { transition-delay: 0.2s; }
.anim-delay-2 { transition-delay: 0.6s; }
.anim-delay-3 { transition-delay: 1.0s; }
.anim-delay-4 { transition-delay: 1.4s; }

/* Header */
header {
    margin-bottom: 3.5rem;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* Content */
.content {
    width: 100%;
    margin-bottom: 4rem;
}

.promise {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 300;
    line-height: 1.4;
    margin-bottom: 3rem;
    color: var(--color-midnight);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Form - Interactie & Beleving */
.signup-form {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    position: relative;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(6, 0, 92, 0.25);
    transition: border-bottom-color var(--transition-snappy), border-bottom-width var(--transition-snappy);
    padding-bottom: 0.5rem;
}

/* Bij klik wordt de onderstreping dikker en voller van kleur */
.input-group:focus-within {
    border-bottom: 2px solid var(--color-midnight);
    padding-bottom: calc(0.5rem - 1px); /* Voorkom layout shift */
}

input[type="email"] {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-midnight);
    font-family: var(--font-sans);
    font-size: 1rem;
    letter-spacing: 0.05em;
    padding: 0.5rem 0;
    width: 100%;
}

input[type="email"]::placeholder {
    color: rgba(6, 0, 92, 0.45);
    font-weight: 300;
    transition: opacity var(--transition-snappy);
}

input[type="email"]:focus::placeholder {
    opacity: 0.3;
}

.submit-btn {
    background: transparent;
    border: none;
    color: var(--color-midnight);
    cursor: pointer;
    padding: 0.5rem;
    margin-left: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-snappy), opacity var(--transition-snappy);
    opacity: 0.6;
}

.submit-btn:hover {
    opacity: 1;
    transform: translateX(3px); /* Subtiele hint voor de actie */
}

/* Lichte schaal-animatie bij een klik (micro-interactie) */
.submit-btn:active {
    transform: scale(0.9) translateX(3px);
}

/* Form Message */
.form-message {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--transition-snappy), transform var(--transition-snappy);
    font-weight: 300;
}

.form-message.success {
    opacity: 1;
    transform: translateY(0);
}

/* Footer (Social Proof Lite) */
footer {
    padding-top: 2rem;
}

.location {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.6;
}

/* 
 * Mobile-First aanpassingen (Verticale Ritmiek) 
 * Onder de 480px sturen we de elementen naar specifieke verticale posities.
 */
@media (max-width: 480px) {
    .container {
        /* Gebruik space-between zodat we de 3 hoofdelementen over het scherm verdelen */
        justify-content: space-between;
        padding-top: 10vh; /* Ruimte aan de bovenkant */
        padding-bottom: 5vh; /* Ruimte aan de onderkant */
    }
    
    header {
        margin-bottom: auto; /* Duwt content naar beneden */
    }
    
    .content {
        margin-top: auto; 
        margin-bottom: auto;
        /* Zorgt dat het input veld in het middelste derde deel van het scherm valt (duim-bereik) */
    }
    
    footer {
        margin-top: auto; /* Duwt footer naar de bodem */
        padding-top: 10vh;
    }

    .brand-name {
        font-size: 2rem;
    }
    
    .promise {
        font-size: 1.5rem;
    }
}

/* Voor grotere schermen vergroten we de typografie en geven we meer ademruimte */
@media (min-width: 768px) {
    .brand-name {
        font-size: 3rem;
    }
    
    .promise {
        font-size: 2.5rem;
        margin-bottom: 4.5rem;
    }
    
    .container {
        padding: 4rem 2rem;
    }

    .input-group {
        padding-bottom: 0.75rem;
    }

    .input-group:focus-within {
        padding-bottom: calc(0.75rem - 1px);
    }
    
    input[type="email"] {
        font-size: 1.125rem;
    }
}