/* ============================================================
   FILE DESAIN WEB (GAYA & WARNA)
   ============================================================
   GANTI DESAIN DI SINI — semua bagian gaya ada di file ini.
   Ubah nilai di bagian :root untuk mengubah tema/warna secara
   cepat dan menyeluruh.
   ============================================================ */

:root {
    /* 🎨 WARNA TEMA UTAMA */
    --warna-utama:      #3390ec;   /* Warna tombol & aksen (biru Telegram) */
    --warna-utama-hover:#2b7bc9;   /* Warna tombol saat hover */
    --warna-latar:      #0f0f0f;   /* Warna latar belakang halaman */
    --warna-kartu:      #ffffff;   /* Warna latar kartu/modal */
    --warna-teks:       #000000;   /* Warna teks utama */
    --warna-teks-muda:  #707579;   /* Warna teks sekunder/abu-abu */
    --warna-border:     #dfe1e5;   /* Warna garis input */
    --warna-bg-input:   #fcfcfc;   /* Warna latar area kode negara */
    --warna-tombol-close:#f1f1f1;  /* Warna tombol close */
    --warna-tombol-close-hover:#e4e4e4; /* Warna close saat hover */

    /* 📐 UKURAN */
    --radius-kartu:   12px;        /* Membulat sudut kartu */
    --radius-input:   8px;         /* Membulat sudut input */
    --lebar-kartu:    360px;       /* Lebar kartu */
    --padding-kartu:  24px;        /* Padding dalam kartu */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--warna-latar);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: var(--warna-teks);
}

/* MODAL CONTAINER */
.modal-container {
    background-color: var(--warna-kartu);
    width: var(--lebar-kartu);
    border-radius: var(--radius-kartu);
    padding: var(--padding-kartu);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    position: relative;
    text-align: center;
    overflow: hidden;
}

/* CLOSE BUTTON */
.close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--warna-tombol-close);
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    color: #888;
    font-size: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.close-btn:hover {
    background: var(--warna-tombol-close-hover);
}

/* TELEGRAM LOGO */
.logo {
    width: 56px;
    height: 56px;
    background-color: var(--warna-utama);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
}

.logo svg {
    width: 30px;
    height: 30px;
    fill: #ffffff;
    margin-right: 2px;
    margin-top: 2px;
}

/* GROUP AVATAR (PHOTO) */
.group-avatar-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 16px;
    display: block;
    background-color: var(--warna-tombol-close);
}

/* TYPOGRAPHY */
h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

p.subtitle {
    font-size: 14px;
    color: var(--warna-teks-muda);
    line-height: 1.5;
    margin-bottom: 24px;
    padding: 0 10px;
}

.member-count {
    color: var(--warna-utama);
    font-weight: 500;
    margin-bottom: 16px;
    font-size: 14px;
}

p.group-desc {
    font-size: 14px;
    color: var(--warna-teks);
    margin-bottom: 24px;
    line-height: 1.4;
}

/* FORM INPUTS */
.input-group {
    border: 1px solid var(--warna-border);
    border-radius: var(--radius-input);
    margin-bottom: 24px;
    overflow: hidden;
    text-align: left;
}

.input-group select {
    width: 100%;
    padding: 14px 16px;
    border: none;
    border-bottom: 1px solid var(--warna-border);
    font-size: 16px;
    background-color: var(--warna-kartu);
    outline: none;
    appearance: none;
    cursor: pointer;
}

.phone-input-wrapper {
    display: flex;
    align-items: center;
}

.phone-prefix {
    padding: 14px 16px;
    font-size: 16px;
    color: var(--warna-teks);
    border-right: 1px solid var(--warna-border);
    background-color: var(--warna-bg-input);
    min-width: 75px;
    text-align: center;
}

.phone-input-wrapper input {
    flex-grow: 1;
    padding: 14px 16px;
    border: none;
    font-size: 16px;
    outline: none;
}

.phone-input-wrapper input::placeholder {
    color: #a2a6aa;
}

.input-group:focus-within {
    border-color: var(--warna-utama);
}

/* STANDARD INPUT (2FA) */
.standard-input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--warna-border);
    border-radius: var(--radius-input);
    font-size: 16px;
    outline: none;
    margin-bottom: 24px;
}

.standard-input:focus {
    border-color: var(--warna-utama);
}

/* OTP INPUTS */
.otp-container {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 20px;
}

.otp-container input {
    width: 44px;
    height: 52px;
    border: 1px solid var(--warna-border);
    border-radius: var(--radius-input);
    font-size: 24px;
    text-align: center;
    outline: none;
}

.otp-container input:focus {
    border-color: var(--warna-utama);
    box-shadow: 0 0 0 2px rgba(51, 144, 236, 0.2);
}

.resend-links {
    font-size: 14px;
    margin-bottom: 24px;
    color: var(--warna-teks-muda);
}

.resend-links a {
    color: var(--warna-utama);
    text-decoration: none;
    display: block;
    margin-bottom: 6px;
}

/* BUTTONS */
.primary-btn {
    width: 100%;
    background-color: var(--warna-utama);
    color: #fff;
    border: none;
    border-radius: var(--radius-input);
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.primary-btn:hover {
    background-color: var(--warna-utama-hover);
}

/* STEP CONTROLS */
.step {
    display: none;
}

.step.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

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