/* ========== Root Theme Variables ========== */
:root {
  --bg-color: #f1f5f9;
  --text-color: #111827;
  --box-color: #ffffff;
  --accent-color: #2563eb;
  --button-bg: #2563eb;
  --button-text: #ffffff;
  --input-bg: #f9fafb;
  --shadow: rgba(0, 0, 0, 0.1);
}

.dark-mode {
  --bg-color: #0f172a;
  --text-color: #f1f5f9;
  --box-color: #1e293b;
  --accent-color: #38bdf8;
  --button-bg: #38bdf8;
  --button-text: #0f172a;
  --input-bg: #334155;
  --shadow: rgba(255, 255, 255, 0.1);
}

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

/* ========== Base Styling ========== */
html, body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  max-width: 100%;
  overflow-x: hidden;
}

.container {
  max-width: 1400px;
  margin: auto;
  padding: 2rem;
  text-align: center;
}

h1 {
  margin-bottom: 0.5rem;
}

p {
  font-size: 1rem;
  color: var(--text-color);
}

/* ========== Layout ========== */
.calculators-wrapper {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.calculator-box {
  background-color: var(--box-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 5px 15px var(--shadow);
  flex: 1 1 30%;
  min-width: 300px;
  max-width: 100%;
  box-sizing: border-box;
}

.calculator-box.wide {
  flex: 1 1 100%;
}

.calculator-box h2 {
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.converter-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  max-width: 180px;
  margin: auto;
}

.converter-row select {
  width: 100%;
  max-width: 180px;
  box-sizing: border-box;
}

.converter-to {
  font-size: 1rem;
  color: var(--text-color);
  text-align: center;
  user-select: none; 
}

.converter-from {
  font-size: 1rem;
  color: var(--text-color);
  text-align: center;
  user-select: none;
}

.inputs p {
  display: flex;
  flex-direction: column; /* stack span above input */
  align-items: center;    /* center horizontally */
  margin-bottom: 1rem;   /* space between rows */
}



/* ========== Inputs, Selects & Buttons ========== */
input,
select {
  padding: 0.6rem;
  font-size: 1rem;
  border-radius: 0.5rem;
  border: 1px solid #ccc;
  background-color: var(--input-bg);
  margin: 0.5rem 0;
  width: 90%;
  max-width: 300px;
}

button {
  background-color: var(--button-bg);
  color: var(--button-text);
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 1rem;
  margin: 0.5rem;
  transition: background-color 0.3s ease;
}

.button-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
  margin-bottom: 0.5rem;
}

.button-row button {
  padding: 0.4rem 0.8rem;
  font-size: 0.95rem;
  min-width: 100px;
}

button:hover {
  background-color: #1d4ed8;
}

/* ========== Results ========== */
#result,
#weightResult,
#distanceResult,
#massAddResult,
#massSubtractResult,
#durationResult,
#contact-form {
  margin-top: 1rem;
  font-weight: bold;
  font-size: 1.1rem;
  color: var(--accent-color);
  word-break: break-word;
}

/* ========== Neon Theme Switch ========== */
.neon-switch {
  position: fixed;
  top: 1rem;
  left: 25rem;
  display: inline-block;
  width: 70px;
  height: 40px;
  z-index: 9999;
  position: relative;
}

.neon-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
  padding: 0;
  border: none;
  left: 0;
  top: 0;
}

.slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  cursor: pointer;
  background-color: #2563eb;
  border: 2px solid #000;
  border-radius: 34px;
  box-shadow: none;
  transition: background-color 0.4s ease, box-shadow 0.4s ease;
}

.slider::before {
  content: "";
  position: absolute;
  height: 26px;
  width: 26px;
  top: 4px;
  left: 4px;
  background-color: black;
  border: 1px solid black;
  border-radius: 50%;
  box-shadow: none;
  transition: transform 0.4s ease, background-color 0.4s ease, border-color 0.4s ease;
}

/* Toggle Switch Light Mode */
.neon-switch input:checked + .slider {
  background-color: #000;
  border-color: #000;
  box-shadow: none;
}

.neon-switch input:checked + .slider::before {
  transform: translateX(26px);
  background-color: #111;
  border-color: #000;
  box-shadow: none;
}

/* Toggle Switch Dark Mode */
body.dark-mode .slider {
  background-color: #111;
}

body.dark-mode .neon-switch input:checked + .slider {
  background-color: #38bdf8;
  border: 2px solid white;
}

body.dark-mode .neon-switch input:checked + .slider::before {
  transform: translateX(26px);
  background-color: white;
  border-color: white;
}

/* ========== Flatpickr Light Mode Overrides ========== */
body:not(.dark-mode) .flatpickr-calendar {
  background: white !important;
  color: black !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15) !important;
}

body:not(.dark-mode) .flatpickr-month {
  background: #f0f0f0 !important;
  color: black !important;
}

body:not(.dark-mode) .flatpickr-weekdays {
  background: #fafafa !important;
  color: #333 !important;
}

body:not(.dark-mode) .flatpickr-day {
  color: black !important;
  background: white !important;
}

.flatpickr-day.today {
  background: #2563eb;
  color: white;
  border-radius: 50%;
}

.flatpickr-day.selected,
.flatpickr-day.selected:focus,
.flatpickr-day.selected:hover {
  background: #1d4ed8;
  color: white;
  border-radius: 50%;
}

.flatpickr-day:hover {
  background: #93c5fd;
  color: #2563eb;
  border-radius: 50%;
}

.flatpickr-day.disabled,
.flatpickr-day.disabled:hover {
  color: #9ca3af;
  background: transparent;
  cursor: not-allowed;
}

body:not(.dark-mode) .flatpickr-time {
  background: white !important;
  border-top: 1px solid #ccc !important;
  color: black !important;
}

body:not(.dark-mode) .flatpickr-time input {
  background: white !important;
  color: black !important;
  border: 1px solid #ccc !important;
  box-shadow: none !important;
}

body:not(.dark-mode) .flatpickr-time .flatpickr-time-separator {
  color: black !important;
}

body:not(.dark-mode) .flatpickr-am-pm {
  background: white !important;
  color: black !important;
  border: 1px solid #ccc !important;
  box-shadow: none !important;
}




.contact {
  background-color: var(--box-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 5px 15px var(--shadow);
  flex: 1 1 30%;
  min-width: 300px;
  max-width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.contact p {
  font-weight: normal;
  text-align: center;
  margin-bottom: 1rem;
}

.contact form {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100%;
  padding: 0 15px;
  box-sizing: border-box;
  position: relative;
}

.contact form input,
.contact form textarea {
  width: 90%;
  max-width: 100%;
  padding: 0.6rem;
  font-size: 1rem;
  border-radius: 0.5rem;
  border: 1px solid #ccc;
  background-color: var(--input-bg);
  margin: 0.5rem 0;
  resize: vertical;
  font-family: inherit;
  color: var(--text-color);
}

.button-row {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
  width: 100%;
}

.button-row button {
  cursor: pointer;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border-radius: 0.5rem;
  border: none;
  background-color: var(--button-bg);
  color: var(--button-text);
  transition: background-color 0.3s ease;
}

.button-row button:hover {
  background-color: #1d4ed8;
}


/* Pop Up Styles */

body.modal-open {
  overflow: hidden;
}

.modal {
  display: none; /* Hidden by default */
  justify-content: center;
  align-items: center;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0,0,0,0.6); 
}

.modal-content {
  background-color: var(--box-color);
  margin: 0 auto;
  padding: 30px 20px;
  border: 2px solid #ccc;
  border-radius: 10px;
  width: 80%;
  max-width: 400px;
  text-align: center;
  position: relative;
  animation: fadeUp 0.3s ease-out;
}

.modal-content h2 {
    color: var(--text-color);
    padding-bottom: 10px;
}

.modal-content p {
    color: var(--text-color);
    padding-top: 10px;
    font-size: 1.1rem;
}

.close-btn {
  margin-top: 30px;
  padding: 10px 35px;
  background-color: var(--accent-color);
  color: var(--button-text);
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-size: 1rem;
  display: inline-block;
  transition: background-color 0.3s, color 0.3s ease;
}

.close-btn:hover {
  background-color: #1d4ed8;
  color: var(--button-text);
}


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


footer {
  background-color: var(--box-color);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 5px 15px var(--shadow);
  flex: 1 1 30%;
  min-width: 300px;
  max-width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
}

footer span {
  color: var(--accent-color);
}

.modal span{
  color: var(--accent-color);
}

footer p:nth-child(1) {
    font-size: 30px;
    color:var(--text-color);
    margin-bottom: 10px;
    font-weight: bold;
}
footer p:nth-child(2) {
    color: var(--text-color);
    font-size: 17px;
    width: 500px;
    text-align: center;
    line-height: 26px;
}

.social {
    display: flex;
    position: relative;
    bottom: 0.5rem;
}

.social a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 10px 10px;
    background-color: var(--button-bg);
    color: var(--button-text);
    text-decoration: none;
    font-size: 20px;
    box-shadow: 0px 0px 5px #191919, 0px 0px 10px #858585;
}

.social a:hover {
    background-color: #1d4ed8;;
    color: var(--button-text);
    transform: scale(1.1);
    transition: .3s;
}

.end {
    position: absolute;
    color: var(--text-color);
    font-size: 14px;
    margin-top: 10rem;
}

/* ========== Media Query: Max Width 820px (Tablets) ========== */
@media (max-width: 820px) {
  .container {
    padding: 1.5rem;
  }

  .calculator-box,
  .contact {
    flex: 1 1 45%;
    padding: 1.2rem;
  }

  .calculator-box.wide {
    flex: 1 1 100%;
  }

  .neon-switch {
    left: 16rem;
  }

  .converter-row {
    max-width: 100%;
  }

  .modal-content {
    width: 90%;
  }

  .button-row {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .button-row button {
    min-width: 120px;
  }
}

/* ========== Media Query: Max Width 600px (Large Mobile Devices) ========== */
@media (max-width: 600px) {
  .calculator-box,
  .contact {
    flex: 1 1 100%;
    padding: 1rem;
  }

  .neon-switch {
    left: 10rem;
    top: 0.8rem;
    transform: scale(0.9);
  }

  input,
  select,
  textarea {
    font-size: 0.95rem;
  }

  .button-row {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    width: 100%;
    padding: 0;
    box-sizing: border-box;
  }

  .button-row button {
    width: auto;
    min-width: 120px;
    font-size: 0.95rem;
    padding: 0.6rem 1.2rem;
  }

  .modal-content {
    padding: 20px 15px;
    width: 95%;
  }

  .close-btn {
    width: 40%;
    padding: 12px 0;
    font-size: 15px;
    margin-top: 20px;
  }

  .end {
  margin-top: 11rem;
}
}

/* ========== Media Query: Max Width 480px (Small Mobile Devices) ========== */
@media (max-width: 480px) {
  .container {
    padding: 1rem;
  }

  h1 {
    font-size: 1.4rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  .calculator-box,
  .contact {
    padding: 0.8rem;
    border-radius: 0.8rem;
  }

  input,
  select,
  textarea {
    padding: 0.5rem;
    font-size: 0.9rem;
  }

  .neon-switch {
    left: 6rem;
    top: 0.5rem;
    transform: scale(0.85);
  }

  .button-row button {
    width: 100%;
    font-size: 0.95rem;
  }

  .modal-content {
    width: 80%;
    padding: 15px 10px;
  }

  .modal-content h2 {
    font-size: 1.2rem;
  }

  .modal-content p {
    font-size: 1rem;
  }
    .close-btn {
    width: 40%;
    padding: 12px 0;
    font-size: 15px;
    margin-top: 20px;
  }

  .end {
  margin-top: 10rem;
}

}