style.css

/* style.css (Versi Perbaikan Final) */

/* CSS Variables untuk warna agar mudah diubah */
:root {
    --bg-color: #f0f2f5;
    --card-bg: white;
    --text-color: #333;
    --subtitle-color: #606770;
    --primary-blue: #1877f2;
    --blue-hover: #166fe5;
    --border-color: #dddfe2;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
}

header {
    background-color: var(--card-bg);
    color: var(--primary-blue);
    text-align: center;
    padding: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 100%;
}

header h1 {
    margin: 0;
    font-weight: 700;
}

/* 'main' HANYA bertugas untuk mengisi ruang dan menengahkan 'card' */
main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    width: 100%;
    box-sizing: border-box;
}

/* 'card' berisi semua konten dan mengatur dirinya sendiri */
.card {
    background-color: var(--card-bg);
    padding: 2.5rem 3.5rem;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 550px;
    width: 100%;
    border: 1px solid #e7e7e7;
}

.card .subtitle {
    font-size: 0.9rem;
    color: var(--subtitle-color);
    margin-top: -1rem;
    margin-bottom: 2rem;
}

/* --- Desain Form Elements --- */
textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    margin-bottom: 1.5rem;
    resize: vertical;
    box-sizing: border-box; /* Important for padding and width */
    transition: border-color 0.3s, box-shadow 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(24, 119, 242, 0.2);
}

button {
    background-color: var(--primary-blue);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 4px 10px rgba(24, 119, 242, 0.3);
    margin-bottom: 1rem;
}

button:hover {
    background-color: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(24, 119, 242, 0.4);
}

button:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(24, 119, 242, 0.3);
}

/* --- Area Hasil & Footer --- */
#resultContainer {
    margin-top: 1.5rem;
}

#resultArea {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1c1e21;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

#resultArea.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--primary-blue);
    animation: spin 1s ease infinite;
    margin: 1.5rem auto; /* Beri margin agar tidak terlalu dekat */
}

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

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem 0;
    width: 100%;
    font-size: 0.9rem;
}