@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap");

/* --- 1. SETUP VARIABLE --- */
:root {
    --bg-body: #1e1e24;
    --bg-panel: #2b2b36;
    --bg-overlay: linear-gradient(135deg, #2563eb, #1d4ed8);

    --text-main: #ffffff;
    --text-muted: #d1d5db;
    --primary: #3b82f6;
    --primary-hover: #2563eb;

    --input-border: #4b4b5a;
    --input-icon: #9ca3af;

    --shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    --radius: 12px;
}

body.light-mode {
    --bg-body: #f3f4f6;
    --bg-panel: #ffffff;
    --bg-overlay: linear-gradient(135deg, #3b82f6, #2563eb);
    --text-main: #111827;
    --text-muted: #4b5563;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --input-border: #d1d5db;
    --input-icon: #6b7280;
    --shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-body);
    transition: background 0.4s ease;
    overflow: hidden;
}

/* --- BUTTON & THEME TOGGLE --- */
.btn-home,
.theme-toggle {
    position: absolute;
    top: 20px;
    z-index: 100;
    text-decoration: none;
    color: var(--text-main);
    transition: 0.3s;
}

.btn-home {
    left: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 500;
    opacity: 0.9;
}

.btn-home:hover {
    opacity: 1;
    color: var(--primary);
}

.theme-toggle {
    right: 30px;
    width: 32px;
    height: 32px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background: rgba(128, 128, 128, 0.15);
    cursor: pointer;
}

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

/* --- CONTAINER (TINGGI DISESUAIKAN: 600px) --- */
.container {
    position: relative;
    width: 700px;
    /* UPDATE: Tinggi 600px cukup untuk form register tanpa memotong link */
    height: 600px;
    background: var(--bg-panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
}

/* --- FORM SECTION --- */
.form-box {
    position: absolute;
    top: 0;
    height: 100%;
    width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 40px;
    transition: all 0.6s ease-in-out;
    z-index: 1;
    background: var(--bg-panel);
}

.form-header h2 {
    font-size: 1.5rem;
    color: var(--text-main);
    margin-bottom: 2px;
    font-weight: 700;
}

.form-header p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 5px;
    /* Margin dikurangi */
    font-weight: 400;
}

/* --- PLAN BADGE (Compact) --- */
.plan-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

/* --- INPUT FIELDS (Compact & Tight) --- */
.input-box {
    position: relative;
    width: 100%;
    /* UPDATE: Margin antar input 12px agar muat semua */
    margin-top: 12px;
    height: 40px;
    /* Tinggi input standar compact */
}

.input-box input {
    width: 100%;
    height: 100%;
    background: transparent;
    border: none;
    outline: none;
    border-bottom: 1px solid var(--input-border);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 500;
    padding-right: 25px;
    transition: 0.3s;
}

/* Autofill Fix */
.input-box input:-webkit-autofill,
.input-box input:-webkit-autofill:hover,
.input-box input:-webkit-autofill:focus,
.input-box input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--bg-panel) inset !important;
    -webkit-text-fill-color: var(--text-main) !important;
    transition: background-color 5000s ease-in-out 0s;
}

.input-box label {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 13px;
    pointer-events: none;
    transition: 0.3s;
}

.input-box i {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    color: var(--input-icon);
    font-size: 15px;
    transition: 0.3s;
}

/* Focus State */
.input-box input:focus,
.input-box input:valid {
    border-bottom-color: var(--primary);
}

.input-box input:focus ~ label,
.input-box input:valid ~ label {
    top: -5px;
    color: var(--primary);
    font-size: 10px;
    font-weight: 600;
}

.input-box input:focus ~ i,
.input-box input:valid ~ i {
    color: var(--primary);
}

.alert-error {
    display: block;
    color: #ef4444;
    font-size: 10px;
    margin-top: 1px;
    min-height: 14px;
    font-weight: 500;
}

/* --- BUTTONS --- */
.btn {
    width: 100%;
    height: 38px;
    background: var(--primary);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    color: #ffffff !important;
    font-size: 13px;
    font-weight: 600;
    margin-top: 15px;
    /* Jarak tombol ke input terakhir */
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.3);
}

/* --- LINKS (Fixed Position) --- */
.regi-link {
    text-align: center;
    margin-top: 15px;
    /* Jarak aman dari tombol */
    font-size: 11px;
    color: var(--text-main);
    font-weight: 400;
    position: relative;
    z-index: 10;
    /* Pastikan di atas layer lain */
}

.regi-link a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    margin-left: 3px;
}

.regi-link a:hover {
    text-decoration: underline;
}

/* --- OVERLAY ANIMATION --- */
.overlay-container {
    position: absolute;
    top: 0;
    left: 50%;
    width: 50%;
    height: 100%;
    overflow: hidden;
    transition: transform 0.6s ease-in-out;
    z-index: 100;
}

.overlay {
    background: var(--bg-overlay);
    color: #fff;
    position: relative;
    left: -100%;
    height: 100%;
    width: 200%;
    transform: translateX(0);
    transition: transform 0.6s ease-in-out;
}

.info-content {
    position: absolute;
    top: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 50%;
    height: 100%;
    padding: 0 30px;
    text-align: center;
}

.info-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #fff;
}

.info-content p {
    font-size: 0.85rem;
    color: #e0e7ff;
    line-height: 1.5;
}

.info-content.Login {
    transform: translateX(0);
}

.info-content.Register {
    right: 0;
    transform: translateX(0);
}

.form-box.Login {
    left: 0;
}

.form-box.Register {
    left: 0;
    opacity: 0;
    z-index: -1;
}

.overlay-container {
    left: 50%;
}

.container.active .form-box.Login {
    transform: translateX(100%);
    opacity: 0;
    z-index: -1;
}

.container.active .form-box.Register {
    transform: translateX(100%);
    opacity: 1;
    z-index: 5;
}

.container.active .overlay-container {
    transform: translateX(-100%);
}

.container.active .overlay {
    transform: translateX(50%);
}

.animation {
    transition: 0.6s;
    opacity: 1;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .container {
        width: 100%;
        height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }

    .overlay-container {
        display: none;
    }

    .form-box {
        width: 100%;
        padding: 0 30px;
    }

    .form-box.Login {
        left: 0;
        opacity: 1;
        z-index: 5;
    }

    .form-box.Register {
        left: 0;
        opacity: 0;
        pointer-events: none;
    }

    .container.active .form-box.Login {
        display: none;
    }

    .container.active .form-box.Register {
        transform: none;
        opacity: 1;
        pointer-events: auto;
        z-index: 5;
    }
}