/* Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
    font-family: 'Segoe UI', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

body.dark-mode {
    background-color: #1a1a1a;
    color: #e5e5e5;
}

/* Logo */
.site-logo {
    position: fixed;
    top: 16px;
    left: 20px;
    font-size: 28px;
    cursor: pointer;
    z-index: 100;
    background-color: #ffd000;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 16px;
    right: 20px;
    background: #ffd000;
    border: none;
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 20px;
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

body.dark-mode .theme-toggle {
    background: #ffd000;
}

/* Card Container — acts as viewport window */
.card-container {
    width: 440px;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.18);
}

/* Slider — holds both panels side by side */
.card-slider {
    display: flex;
    width: 200%;
    transition: transform 0.5s cubic-bezier(0.77, 0, 0.175, 1);
}

/* Each card takes exactly half the slider (= full viewport width) */
.card {
    width: 50%;
    background-color: #2e2e2e;
    padding: 48px 40px 40px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex-shrink: 0;
}

body:not(.dark-mode) .card {
    background-color: #3a3a3a;
}

/* Heading */
.card h2 {
    font-size: 26px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 6px;
}

/* Inputs */
.card input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 30px;
    border: none;
    background-color: #f0f0f0;
    font-size: 14px;
    color: #333;
    outline: none;
    transition: box-shadow 0.2s;
}

.card input:focus {
    box-shadow: 0 0 0 3px rgba(255, 208, 0, 0.5);
}

/* Forgot password */
.forgot {
    text-align: right;
    margin-top: -6px;
}

.forgot a {
    color: #ff4d4d;
    font-size: 13px;
    text-decoration: none;
}

.forgot a:hover {
    text-decoration: underline;
}

/* Primary Button */
.btn-primary {
    width: 100%;
    padding: 13px;
    border-radius: 30px;
    border: none;
    background-color: #b0b0b0;
    color: #1a1a1a;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 4px;
}

.btn-primary:hover {
    background-color: #ffd000;
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
    width: 100%;
    padding: 11px;
    border-radius: 30px;
    border: 2px solid #888;
    background-color: transparent;
    color: #ccc;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
}

.btn-secondary:hover {
    border-color: #ffd000;
    color: #ffd000;
}