:root {
    --color-bg: #0F172A; /* Azul escuro */
    --color-surface: #FFFFFF; /* Branco */
    --color-surface-alt: #F8FAFC; /* Cinza claro */
    --color-text: #1E293B;
    --color-text-light: #64748B;
    --color-primary: #24A1DE; /* Telegram Blue (Adaptado do Verde WhatsApp original por ser Telegram) */
    --color-primary-hover: #1d8bc2;
    --color-border: #E2E8F0;
    --color-error: #EF4444;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem;
}

.container {
    width: 100%;
    max-width: 50vw;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.header {
    text-align: center;
    color: var(--color-surface);
    margin-bottom: 1rem;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.header p {
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
}

.offer-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background-color: var(--color-primary);
    color: white;
    padding: 0.9rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.offer-navbar-brand {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.offer-navbar-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-shrink: 0;
}

.offer-navbar-links a {
    color: rgba(255,255,255,0.9);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.offer-navbar-links a:hover {
    color: white;
    text-decoration: underline;
}

@media (max-width: 640px) {
    .offer-navbar {
        flex-direction: column;
        align-items: flex-start;
    }
}

.card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.required {
    color: var(--color-error);
}

.optional {
    color: var(--color-text-light);
    font-weight: 400;
    font-size: 0.8rem;
}

input[type="text"],
input[type="url"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: var(--transition);
}

input[type="text"]:focus,
input[type="url"]:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(36, 161, 222, 0.2);
}

.input-row {
    display: flex;
    gap: 1rem;
}

.dynamic-url-row {
    align-items: center;
}

.remove-url-btn {
    background: none;
    border: none;
    color: var(--color-error);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.remove-url-btn:hover {
    color: #b91c1c;
    transform: scale(1.1);
}

.remove-client-btn {
    background: none;
    border: none;
    color: var(--color-error);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.remove-client-btn:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: #b91c1c;
}

.add-url-btn {
    background: none;
    border: none;
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    margin-top: 0.5rem;
    padding: 0.25rem 0;
    text-align: left;
}

.add-url-btn:hover {
    text-decoration: underline;
}

.select-wrapper {
    position: relative;
}

select {
    appearance: none;
    padding-right: 2.5rem;
    cursor: pointer;
}

.select-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
    pointer-events: none;
}

.preview-card {
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.preview-card h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

textarea {
    width: 100%;
    height: 200px;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-surface);
    resize: vertical;
    margin-bottom: 1.5rem;
}

textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.edited-template {
    border-color: #F59E0B !important;
    background-color: #FFFBEB !important;
    box-shadow: inset 0 0 0 1px #F59E0B;
}

.submit-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    padding: 1rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.submit-btn:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    background-color: var(--color-text-light);
    opacity: 0.6;
    cursor: not-allowed;
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.secondary-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: transparent;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1rem;
    padding: 1rem;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.secondary-btn:hover:not(:disabled) {
    background-color: rgba(36, 161, 222, 0.1);
}

.secondary-btn:active:not(:disabled) {
    transform: translateY(0);
}

.secondary-btn:disabled {
    color: var(--color-text-light);
    border-color: var(--color-text-light);
    opacity: 0.6;
    cursor: not-allowed;
}

@media (max-width: 1024px) {
    .container {
        max-width: 80vw;
    }
}

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }
    .container {
        max-width: 100%;
    }
    .card {
        padding: 1.5rem;
    }
    .input-row {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Login / Register / Admin / Offer Overlay Styles */
#login-overlay,
#register-overlay,
#admin-overlay,
#offer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

#admin-overlay {
    background-color: rgba(15, 23, 42, 0.85);
}

input[type="email"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: var(--transition);
}

input[type="email"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(36, 161, 222, 0.2);
}

.login-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.5s ease-out forwards;
}

input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: var(--transition);
}

input[type="password"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(36, 161, 222, 0.2);
}