:root {
    --bg: #f0f2f5;
    --text: #1a1a1a;
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-border: rgba(255, 255, 255, 0.2);
    --shadow-1: rgba(0, 0, 0, 0.1);
    --shadow-2: rgba(0, 0, 0, 0.2);
    --button-shadow: rgba(0, 0, 0, 0.2);
    --noise-opacity: 0.5;
    --toggle-hover: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
    --bg: #0f1218;
    --text: #f1f4f8;
    --card-bg: rgba(18, 22, 30, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --shadow-1: rgba(0, 0, 0, 0.4);
    --shadow-2: rgba(0, 0, 0, 0.6);
    --button-shadow: rgba(0, 0, 0, 0.5);
    --noise-opacity: 0.25;
    --toggle-hover: rgba(255, 255, 255, 0.12);
}

body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    overflow: hidden; /* Hide scrollbars from pseudo-element */
    transition: background-color 0.3s ease, color 0.3s ease;
}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="4" stitchTiles="stitch"/></filter><rect width="100" height="100" filter="url(%23n)" opacity="0.05"/></svg>');
    opacity: var(--noise-opacity);
    pointer-events: none; /* Make sure it doesn't interfere with interactions */
}

.container {
    position: relative; /* For z-indexing above the pseudo-element */
    text-align: center;
    background-color: var(--card-bg);
    padding: 3rem 4rem;
    border-radius: 20px;
    box-shadow: 
        0 4px 6px var(--shadow-1),
        0 15px 40px var(--shadow-2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px); /* For Safari */
    border: 1px solid var(--card-border);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

h1 {
    margin-bottom: 2rem;
    color: var(--text);
    font-weight: 700;
    font-size: 2rem;
    transition: color 0.3s ease;
}

.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--card-border), transparent);
    margin: 2.5rem 0 2rem;
}

.partner-section {
    text-align: left;
}

.partner-section h2 {
    margin: 0 0 0.4rem 0;
    font-size: 1.2rem;
    color: var(--text);
}

.partner-subtitle {
    margin: 0 0 1.4rem 0;
    color: var(--text);
    opacity: 0.8;
    font-size: 0.95rem;
}

.partner-form {
    display: grid;
    gap: 1rem;
}

.partner-field {
    display: grid;
    gap: 0.4rem;
    font-size: 0.9rem;
    color: var(--text);
}

.partner-field input,
.partner-field textarea {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.7);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

[data-theme="dark"] .partner-field input,
[data-theme="dark"] .partner-field textarea {
    background: rgba(18, 22, 30, 0.7);
}

.partner-field input:focus,
.partner-field textarea:focus {
    border-color: #2575fc;
    box-shadow: 0 0 0 3px rgba(37, 117, 252, 0.2);
}

.partner-submit {
    justify-self: start;
    background: linear-gradient(45deg, #2575fc 0%, #2bb7ff 100%);
    color: white;
    border: none;
    padding: 0.8rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 6px 18px var(--button-shadow);
}

.partner-submit:hover {
    transform: translateY(-2px);
}

.hp-field {
    position: absolute;
    left: -10000px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.theme-toggle {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    border: 1px solid var(--card-border);
    background: transparent;
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(6px);
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--toggle-hover);
}

#generate {
    background: linear-gradient(45deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    margin-bottom: 2.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--button-shadow);
}

@media (max-width: 640px) {
    .container {
        padding: 2.5rem 2rem;
    }

    .number-container {
        flex-wrap: wrap;
    }
}

#generate:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(37, 117, 252, 0.5);
}

.number-container {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    min-height: 70px; /* Prevent layout shift */
}