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

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

/* ===== COLOR SYSTEM (FPT STYLE) ===== */
:root{
    --fpt-orange: #f37021;
    --fpt-orange-light: #ff9f66;
    --fpt-white: #ffffff;
    --fpt-gray: #f5f5f5;
    --fpt-text: #333;
    --fpt-border: #ddd;
}

/* ===== BODY ===== */
body{
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--fpt-gray);
}

/* ===== BACK BUTTON ===== */
.back{
    position: absolute;
    top: 25px;
    left: 25px;

    padding: 10px 22px;
    border-radius: 30px;

    font-size: 0.8em;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;

    text-decoration: none;
    color: var(--fpt-orange);
    background: var(--fpt-white);

    border: 1px solid var(--fpt-border);
    box-shadow: 0 6px 15px rgba(0,0,0,0.08);

    transition: 0.3s ease;
}

.back::before{
    content: "←";
    margin-right: 8px;
}

.back:hover{
    background: var(--fpt-orange);
    color: #fff;
    transform: translateX(-4px);
}

/* ===== CONTAINER ===== */
.container{
    padding: 45px 50px;
    border-radius: 18px;
    background: var(--fpt-white);
    box-shadow: 0 25px 60px rgba(0,0,0,0.12);
}

/* ===== FORM ===== */
.container .form{
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
}

.container .signin{
    display: none;
}

/* ===== TITLE ===== */
.container .form h2{
    color: var(--fpt-orange);
    font-weight: 600;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

/* ===== INPUT ===== */
.container .form .inputBox{
    position: relative;
    width: 320px;
}

.container .form .inputBox input{
    width: 100%;
    padding: 14px 14px 14px 48px;

    border-radius: 30px;
    border: 1px solid var(--fpt-border);
    background: #fff;

    font-size: 0.95em;
    color: var(--fpt-text);
    outline: none;

    transition: 0.3s ease;
}

/* ICON */
.container .form .inputBox i{
    position: absolute;
    top: 15px;
    left: 18px;
    color: var(--fpt-orange);
}

/* LABEL */
.container .form .inputBox span{
    position: absolute;
    left: 48px;
    top: 50%;
    transform: translateY(-50%);

    font-size: 0.9em;
    color: #999;
    pointer-events: none;
    transition: 0.3s ease;
    background: #fff;
    padding: 0 6px;
}

/* FLOAT LABEL */
.container .form .inputBox input:focus ~ span,
.container .form .inputBox input:valid ~ span{
    top: -6px;
    font-size: 0.65em;
    color: var(--fpt-orange);
}

/* INPUT FOCUS */
.container .form .inputBox input:focus{
    border-color: var(--fpt-orange);
    box-shadow: 0 0 0 3px rgba(243,112,33,0.15);
}

/* ===== SUBMIT BUTTON ===== */
.container .form .inputBox input[type="submit"]{
    padding: 12px 0;
    background: var(--fpt-orange);
    color: #fff;

    font-weight: 600;
    letter-spacing: 0.08em;
    cursor: pointer;
    border: none;

    box-shadow: 0 10px 20px rgba(243,112,33,0.35);
    transition: 0.3s ease;
}

.container .form .inputBox input[type="submit"]:hover{
    background: var(--fpt-orange-light);
    transform: translateY(-2px);
}

/* ===== TEXT ===== */
.container .form p{
    font-size: 0.8em;
    color: #777;
}

.container .form p a{
    color: var(--fpt-orange);
    font-weight: 500;
    text-decoration: none;
}

.container .form p a:hover{
    text-decoration: underline;
}