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

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

/* ========== THEME VARIABLES ========== */
:root {
    /* Soft calm colors (Dark) */
    --bg-main: linear-gradient(135deg, #1e293b, #273449, #2f3e57);
    --card-bg: rgba(255, 255, 255, 0.14);
    --text-main: #f1f5ff;
    --text-soft: rgba(240,245,255,0.65);
    --input-bg: rgba(255,255,255,0.10);
    --border-soft: rgba(255,255,255,0.25);

    /* Accent (soft teal–blue) */
    --accent: #7dd3c7;
    --accent-2: #93c5fd;
}

/* Light Mode – very soft & clean */
body.light {
    --bg-main: linear-gradient(135deg, #f6f9ff, #edf2ff, #e6ecff);
    --card-bg: rgba(255,255,255,0.92);
    --text-main: #0f172a;
    --text-soft: rgba(15,23,42,0.6);
    --input-bg: rgba(255,255,255,0.98);
    --border-soft: rgba(0,0,0,0.15);
    --accent: #4f9cff;
    --accent-2: #6ee7b7;
}

/* ========== BODY ========== */
body {
    min-height: 100vh;
    background: var(--bg-main);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background 0.7s ease, color 0.7s ease;
    overflow: hidden;
}

/* ========== SOFT BACKGROUND GLOW ========== */
.bg::before,
.bg::after {
    content: "";
    position: absolute;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, rgba(125,211,199,0.35), transparent 70%);
    filter: blur(160px);
    animation: float 14s ease-in-out infinite alternate;
}

.bg::after {
    top: 55%;
    left: 55%;
    background: radial-gradient(circle, rgba(147,197,253,0.35), transparent 70%);
}

@keyframes float {
    from { transform: translateY(0); }
    to { transform: translateY(-60px); }
}

/* ========== LOGIN CARD (BIGGER) ========== */
.login-card {
    width: 420px;              /* 👈 bigger */
    padding: 100px 60px;        /* 👈 more space */
    border-radius: 28px;
    background: var(--card-bg);
    backdrop-filter: blur(32px);
    -webkit-backdrop-filter: blur(32px);
    border: 1px solid var(--border-soft);
    box-shadow: 0 40px 80px rgba(0,0,0,0.45);
    animation: slideIn 1s ease forwards;
    transition: background 0.6s ease, border 0.6s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== TITLE ========== */
.logo {
    text-align: center;
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 35px;
    letter-spacing: 0.6px;
}

/* ========== ERROR ========== */
.error {
    background: rgba(255, 90, 90, 0.15);
    color: #ffd1d1;
    padding: 14px;
    border-radius: 14px;
    font-size: 14px;
    margin-bottom: 22px;
    text-align: center;
}

/* ========== INPUTS ========== */
.input-group {
    position: relative;
    margin-bottom: 32px;
}

.input-group input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    padding: 16px 48px;
    color: var(--text-main);
    font-size: 15px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(125,211,199,0.25);
}

/* Floating label */
.input-group label {
    position: absolute;
    left: 48px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-soft);
    font-size: 14px;
    pointer-events: none;
    transition: 0.3s ease;
}

.input-group input:focus + label,
.input-group input:valid + label {
    top: -10px;
    font-size: 12px;
    color: var(--accent);
    background: var(--card-bg);
    padding: 0 8px;
    border-radius: 8px;
}

/* Icons */
.input-group i {
    position: absolute;
    top: 18px;
    left: 18px;
    font-size: 15px;
    color: var(--accent);
}

/* Password toggle */
.toggle {
    position: absolute;
    top: 18px;
    right: 18px;
    cursor: pointer;
    color: var(--text-soft);
    transition: 0.3s;
}

.toggle:hover {
    color: var(--text-main);
}

/* ========== BUTTON ========== */
.btn {
    width: 100%;
    padding: 17px;
    border-radius: 18px;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #0f172a;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.6px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 18px 40px rgba(125,211,199,0.45);
    transition: all 0.35s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 28px 55px rgba(125,211,199,0.6);
}

/* ========== THEME TOGGLE (CENTER) ========== */
.theme-toggle {
    margin-top: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    font-size: 22px;
    cursor: pointer;
    backdrop-filter: blur(22px);
    transition: all 0.4s ease;
}

.theme-toggle:hover {
    transform: rotate(20deg) scale(1.12);
}

/* ========== CREDIT ========== */
.credit {
    margin-top: 32px;
    text-align: center;
    font-size: 13px;
    color: var(--text-soft);
}