/* ================= CSS VARIABLES & RESET ================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-dark: #0a0f0f;
    --form-bg: #1c2222;
    --input-bg: #2b3232;
    --accent-green: #1a7a53;
    --accent-hover: #146142;
    --text-main: #ffffff;
    --text-muted: #8b9a9a;
    --border-color: #2a3434;
    --font-family: 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-family);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
}

/* ================= HEADER ================= */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 24px;
    font-weight: 700;
}

.home-icon {
    width: 35px;
    height: 35px;
    border: 1px solid var(--text-muted);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

/* ================= MAIN LAYOUT ================= */
.app-container {
    display: flex;
    min-height: 100vh;
    padding-top: 60px; /* Space for header */
}

/* Left Graphic Section */
.graphic-area {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bg-graphic {
    width: 80%;
    max-width: 500px;
    object-fit: contain;
    filter: drop-shadow(0 0 30px rgba(26, 122, 83, 0.3));
    opacity: 0.8;
}

/* Right Form Section */
.auth-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 40px;
    max-width: 600px;
    margin: 0 auto;
}

/* ================= TABS ================= */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 600;
    padding: 15px 0;
    cursor: pointer;
    transition: 0.3s;
}

.tab-btn.active {
    color: var(--text-main);
    border-bottom: 3px solid var(--accent-green);
}

/* ================= FORMS & INPUTS ================= */
.form-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 14px;
    color: var(--text-muted);
}

input[type="text"], input[type="password"], input[type="number"], select {
    width: 100%;
    background-color: var(--input-bg);
    border: 1px solid transparent;
    color: var(--text-main);
    padding: 15px;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
    transition: 0.3s;
}

input:focus, select:focus {
    border-color: var(--accent-green);
}

/* Custom Select Dropdown & Phone Group */
.select-wrapper {
    position: relative;
}

.phone-input-group {
    display: flex;
    background-color: var(--input-bg);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid transparent;
}

.phone-input-group:focus-within {
    border-color: var(--accent-green);
}

.country-code {
    padding: 15px;
    background-color: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 8px;
    border-right: 1px solid var(--border-color);
    min-width: 100px;
}

.phone-input-group input {
    background: none;
    border: none;
    flex: 1;
}

/* Buttons & Links */
.forgot-link {
    text-align: right;
}

.forgot-link a {
    color: var(--accent-green);
    text-decoration: none;
    font-size: 14px;
}

.btn-primary {
    background-color: var(--accent-green);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

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

/* ================= STEPPER (Progress Bar) ================= */
.stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 2;
}

.circle {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--input-bg);
    color: var(--text-muted);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 600;
}

.step.active .circle, .step.completed .circle {
    background-color: var(--accent-green);
    color: white;
}

.step span {
    font-size: 12px;
    color: var(--text-muted);
}

.step.active span {
    color: var(--accent-green);
}

.line {
    flex: 1;
    height: 2px;
    background-color: var(--input-bg);
    margin: 0 -15px;
    transform: translateY(-12px);
    z-index: 1;
}

.active-line {
    background-color: var(--accent-green);
}

/* ================= UTILITIES & EXTRAS ================= */
.hidden { display: none !important; }

.back-header {
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    margin-bottom: 30px;
}

.back-header h2 { font-size: 20px; }

.step-title {
    font-size: 20px;
    margin-bottom: 20px;
    text-align: center;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-top: 10px;
}

.checkbox-group input { margin-top: 4px; accent-color: var(--accent-green); }
.checkbox-group label { font-size: 13px; color: var(--text-muted); line-height: 1.4; }
.checkbox-group span { color: var(--accent-green); cursor: pointer; }

.password-rules {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.password-rules p {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Floating Chat Icon */
.floating-chat {
    position: fixed;
    bottom: 30px;
    right: 30px;
}
.chat-icon {
    width: 50px;
    height: 50px;
    background-color: #000;
    border: 2px solid var(--accent-green);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    cursor: pointer;
}

/* ================= RESPONSIVE DESIGN ================= */
@media (max-width: 900px) {
    .graphic-area {
        display: none; /* ট্যাবলেট এবং মোবাইলে ৩ডি গ্রাফিক্স হাইড করা হলো */
    }
    .auth-area {
        padding: 20px;
        width: 100%;
        max-width: 100%;
    }
}