/* ==========================================================================
   Calculadora de Bateria PT-70X
   Visual identity matches the GPS platform login page (login-modern.css).
   ========================================================================== */

:root {
    --primary-color: #2FA4C7;
    --primary-dark:  #1B7C99;
    --primary-light: #4dd0e1;
    --bg-dark-1: #0f1419;
    --bg-dark-2: #1a2332;
    --bg-dark-3: #1e2936;
    --bg-card:   rgba(30, 41, 54, 0.95);
    --bg-input:  rgba(255, 255, 255, 0.05);
    --bg-input-focus: rgba(255, 255, 255, 0.08);
    --border-soft: rgba(255, 255, 255, 0.1);
    --border-softer: rgba(255, 255, 255, 0.05);
    --text-primary:   #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted:     #b0b0b0;
    --accent-danger:  #ef5350;
    --accent-success: #66bb6a;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #0f1419 0%, #1a2332 50%, #0f1419 100%);
    background-attachment: fixed;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(47, 164, 199, 0.10), transparent 45%),
        radial-gradient(circle at 80% 80%, rgba(27, 124, 153, 0.10), transparent 45%);
    pointer-events: none;
    z-index: 0;
}

/* ----- Header ----------------------------------------------------------- */

.page-header {
    background: linear-gradient(90deg, #1B7C99 0%, #2FA4C7 100%);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 10;
    flex-shrink: 0;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.header-logo {
    height: 36px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.page-header h1 {
    font-size: 24px;
    font-weight: 300;
    font-style: italic;
    letter-spacing: 1px;
    color: #ffffff;
    margin: 0;
    text-align: center;
}

/* ----- Main ------------------------------------------------------------- */

.page-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

.calc-card {
    width: 100%;
    max-width: 560px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-soft);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 35px 32px;
    animation: fadeInUp 0.6s ease-out;
}

.calc-title {
    font-size: 22px;
    font-weight: 300;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin: 0 0 24px;
    text-align: center;
}

/* ----- Form ------------------------------------------------------------- */

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

input[type="number"],
select {
    width: 100%;
    padding: 13px 15px;
    font-size: 15px;
    font-family: inherit;
    background: var(--bg-input);
    border: 2px solid var(--border-soft);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
    -webkit-appearance: none;
    appearance: none;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type="number"] {
    -moz-appearance: textfield;
}

input[type="number"]:focus,
select:focus {
    background: var(--bg-input-focus);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(47, 164, 199, 0.20);
}

input[type="number"]::placeholder {
    color: var(--text-muted);
}

/* Custom select arrow */
.select-wrapper {
    position: relative;
}
.select-wrapper::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: translateY(-70%) rotate(45deg);
    pointer-events: none;
    transition: var(--transition);
}
.select-wrapper:focus-within::after {
    border-color: var(--primary-light);
}

select {
    padding-right: 38px;
    cursor: pointer;
}
select option {
    background: var(--bg-dark-3);
    color: var(--text-primary);
}

.interval-row {
    display: grid;
    grid-template-columns: 1fr 170px;
    gap: 10px;
}

.form-hint {
    margin: 6px 2px 0;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
}

/* ----- Calculate button ------------------------------------------------- */

.btn-calc {
    width: 100%;
    padding: 15px 30px;
    margin-top: 8px;
    font-size: 16px;
    font-weight: 600;
    font-family: inherit;
    letter-spacing: 1px;
    color: #ffffff;
    background: linear-gradient(90deg, #1B7C99 0%, #2FA4C7 100%);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.btn-calc::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
}

.btn-calc:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(47, 164, 199, 0.4);
}

.btn-calc:hover::before {
    left: 100%;
}

.btn-calc:hover .btn-arrow {
    transform: translateX(5px);
}

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

.btn-arrow {
    transition: transform 0.3s ease;
    font-weight: 400;
}

/* ----- Error message ---------------------------------------------------- */

.error-msg {
    margin-top: 16px;
    padding: 12px 14px;
    background: rgba(239, 83, 80, 0.10);
    border: 1px solid rgba(239, 83, 80, 0.45);
    border-radius: var(--border-radius-sm);
    color: var(--accent-danger);
    font-size: 14px;
    text-align: center;
    animation: fadeIn 0.3s ease;
}

/* ----- Result panel ----------------------------------------------------- */

.result-panel {
    margin-top: 26px;
    padding-top: 22px;
    border-top: 1px solid var(--border-soft);
    animation: fadeIn 0.45s ease;
    outline: none;
}

.result-block {
    text-align: center;
    margin-bottom: 22px;
}

.result-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.result-main {
    font-size: 42px;
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--primary-light);
    line-height: 1.1;
    text-shadow: 0 0 24px rgba(77, 208, 225, 0.30);
}

.result-sub {
    margin-top: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

.breakdown-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 22px;
}

.breakdown-pill {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-soft);
    border-radius: var(--border-radius-sm);
    padding: 14px 12px;
    text-align: center;
    transition: var(--transition);
}

.breakdown-move {
    border-color: rgba(77, 208, 225, 0.45);
}
.breakdown-stop {
    border-color: rgba(255, 255, 255, 0.18);
}

.breakdown-label {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.breakdown-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.breakdown-move .breakdown-value {
    color: var(--primary-light);
}

/* ----- Disclaimer (highlighted warning) --------------------------------- */

.disclaimer {
    margin: 0;
    padding: 16px 18px;
    background: linear-gradient(135deg, rgba(255, 179, 0, 0.10), rgba(255, 138, 0, 0.06));
    border: 1px solid rgba(255, 179, 0, 0.55);
    border-left: 4px solid #ffb300;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 4px 14px rgba(255, 138, 0, 0.10), inset 0 0 0 1px rgba(255, 179, 0, 0.05);
}

.disclaimer-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.disclaimer-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    display: block;
    overflow: visible;
    filter: drop-shadow(0 0 6px rgba(255, 179, 0, 0.55));
}

.disclaimer-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #ffc14d;
    text-transform: uppercase;
}

.disclaimer-body {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.disclaimer-body strong {
    color: #ffd27a;
    font-weight: 600;
}

/* ----- Footer ----------------------------------------------------------- */

.page-footer {
    padding: 12px 40px;
    background: rgba(15, 20, 25, 0.8);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-top: 1px solid var(--border-softer);
    position: relative;
    z-index: 10;
    flex-shrink: 0;
}

.page-footer p {
    margin: 0;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ----- Animations ------------------------------------------------------- */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ----- Responsive ------------------------------------------------------- */

@media (max-width: 768px) {
    .header-inner {
        padding: 12px 20px;
        gap: 12px;
    }
    .page-header h1 {
        font-size: 18px;
        letter-spacing: 0.5px;
    }
    .header-logo {
        height: 28px;
    }
    .page-main {
        padding: 24px 14px;
    }
    .calc-card {
        padding: 26px 22px;
    }
    .calc-title {
        font-size: 20px;
    }
    .result-main {
        font-size: 34px;
    }
    .breakdown-value {
        font-size: 20px;
    }
    .page-footer {
        padding: 10px 16px;
    }
}

@media (max-width: 420px) {
    .header-inner {
        flex-direction: column;
        gap: 8px;
        padding: 12px 14px;
    }
    .page-header h1 {
        font-size: 16px;
    }
    .interval-row {
        grid-template-columns: 1fr;
    }
    .breakdown-row {
        grid-template-columns: 1fr;
    }
    .result-main {
        font-size: 30px;
    }
}

/* ----- Accessibility ---------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }
}

@media (prefers-contrast: more) {
    .calc-card {
        border-width: 2px;
        border-color: #ffffff;
    }
    input[type="number"],
    select {
        border-width: 2px;
    }
}