/* Base Reset & Fonts */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #eef2f3;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    color: #212529;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 500;
    line-height: 1.2;
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

/* Utilities (Bootstrap Replacements) */
.mb-3 { margin-bottom: 1rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.text-start { text-align: left !important; }
.text-center { text-align: center !important; }
.text-muted { color: #6c757d !important; }
.small { font-size: 0.875em; }
.fw-bold { font-weight: 700 !important; }
.text-success { color: #198754 !important; }
.text-danger { color: #dc3545 !important; }

/* Grid System (Bootstrap Replacements) */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-top: 0;
    margin-right: -0.75rem; /* Gutter compensation */
    margin-left: -0.75rem;
}

.col-6 {
    flex: 0 0 auto;
    width: 50%;
    padding-right: 0.75rem; /* Gutter width */
    padding-left: 0.75rem;
}

/* Input Group */
.input-group {
    display: flex;
    gap: 0.5rem;
}

/* Forms (Bootstrap Replacements) */
.form-label {
    margin-bottom: 0.5rem;
    display: inline-block;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: #212529;
    background-color: #fff;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* Buttons (Bootstrap Replacements + Custom Brand) */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    border-radius: 0.375rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn:disabled {
    pointer-events: none;
    opacity: 0.65;
}

/* Component: Card */
.card {
    max-width: 400px;
    width: 100%;
    padding: 2.5rem;
    border-radius: 20px;
    border: none;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    background: #fff;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
}

/* Custom Typography & Elements */
h1 {
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: #7f8c8d;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* The "I'm OK" Brand Button - Overrides .btn base if needed */
.btn-brand {
    background-color: #2ecc71;
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    padding: 15px 30px;
    border-radius: 50px;
    border: none; /* Reset base btn border */
    width: 100%;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.4);
}

.btn-brand:hover {
    background-color: #27ae60;
    transform: translateY(-2px);
    color: white; /* Ensure text color stays white */
}

.btn-brand:disabled {
    background-color: #95a5a6;
    transform: none;
    box-shadow: none;
}

/* Checkbox (Bootstrap Replacements) */
.form-check {
    display: flex;
    align-items: flex-start; /* Align check with top line of text */
    margin-bottom: 1rem;
    text-align: left;
}

.form-check-input {
    flex: 0 0 auto; /* Prevent shrinking */
    width: 1em;
    height: 1em;
    margin-top: 0.25em; /* Optical alignment */
    margin-right: 0.5em;
    vertical-align: top;
    background-color: #fff;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: 1px solid #ced4da;
    border-radius: 0.25em;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out;
}

.form-check-input:checked {
    background-color: #2ecc71;
    border-color: #2ecc71;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
}

.form-check-label {
    font-size: 0.75rem;
    color: #6c757d;
    cursor: pointer;
    line-height: 1.4;
}

/* Language Selector */
.lang-select {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    background: #fff;
    color: #6c757d;
    cursor: pointer;
}

/* Subtle Pulse Animation */
.icon-pulse {
    font-size: 3rem;
    color: #2ecc71;
    margin-bottom: 1rem;
    display: block; /* Ensure it behaves like a block for stacking */
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
    100% {
        transform: scale(0.95);
        opacity: 0.7;
    }
}